Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 991ed0a3e686a006…

MALICIOUS

PDF / .VIR

714.1 KB Created: 2023-09-30 06:08:11 Authoring application: pstoedit First seen: 2024-04-16
MD5: bf5057e9694e1173126cbbce00e143dd SHA-1: 917c318f8b26f1ee671b281be5b88ec929d8beac SHA-256: 991ed0a3e686a00613c49400afd5fb93670b3a9a00040bf890f84ea53fcfdeab
336 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7541

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • QR business lure with obfuscated text critical PDF_QR_BUSINESS_LURE_OBFUSCATED_TEXT
    PDF contains a QR-like image and business-process scan instructions that only match after removing invisible Unicode control characters. This indicates deliberate text obfuscation in a QR phishing lure rather than a normal QR code.
  • QR-code business verification phishing lure high PDF_QR_PHISHING_LURE
    PDF contains a QR-like image and visible text instructing the recipient to scan or use a QR code for verification, HR, payroll, policy, email, signature, or similar business-process activity. This is a high-signal quishing pattern even when the PDF has no active JavaScript or URI action.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://adservice.google.co.bw/ddm/clk/295204063;122181591;w;;%3F//img1.wsimg.com/blobby/go/6bf191b1-72c1-4be4-bceb-35db797fdf1d/downloads/jukegexisevonedo.pdf In PDF document text
    • https://pile-cap-design-guide-pdf.spancer-doom.de/5854352.pdfIn PDF document text
    • https://adservice.google.com.gt/ddm/clk/426382440;228185261;d;;%3F//img1.wsimg.com/blobby/go/2a03ecf7-52a6-4ff5-a2fd-7ca5e6697f62/downloads/gobitedefezikutosodumi.pdfIn PDF document text
    • https://adservice.google.co.tz/ddm/clk/445204615;249060672;c;;%3F//img1.wsimg.com/blobby/go/9f1e3ab6-2312-418e-8bfe-93ca8a74605a/downloads/moxepumapo.pdfIn PDF document text
    • https://adservice.google.com.vn/ddm/clk/408405163;208572896;n;;%3F//img1.wsimg.com/blobby/go/4a1acfb1-c416-42d4-b0b6-356c7642351a/downloads/91239982734.pdfIn PDF document text
    • https://zoxaduk.urseghy.com/262736462?pefuvanobozalerezojabixegatavirubifemesuwigafutanobufadetizubukofizowuwojow=peteruzafubogusufobidoxopotibuziwexuralufesejewunowirazemoretotogexomerijewozarijesozenijeximuvixuroforujubunepemarikamafibixotetivadadajilomubelifulonijesoxekamokedagozolokibozojekopokusilozixulemuvatajakad&utm_term=otogi+spirit+agents+tier+list&fesivokofopudawigobagunejinekotelunozatefibatarapemerajegujedigegusopulenezananarop=tomimumaparuwoxokurubetekepolusoxesujosokagitesigakofenujemifitakafetanakudawowatinasefajijorowadipedijifawagigafIn PDF document text
    • https://zoxaduk.urseghy.com/262736462?pefuvanobozalerezojabixegatavirubifemesuwigafutanobufadetizubukofizowuwojow=peteruzafubogusufobidoxopotibuziwexuralufesejewunowirazemoretotogexomerijewozarijesozenijeximuvixuroforujubunepemarikamafibixotetivadadajilomubelifulonijesoxekamokedagozolokibozojekopokuPDF link annotation
    • https://zoxaduk.urseghy.com/262736462?pefuvanobozalerezojabixegatavirubifemesuwigafutanobufadetizubukofizowuwojow=peteruzafubogusufobidoxopotibuziwexuralufesejewunowirazemoretotogexomerijewozarijesozenijeximuvixuroforujubunepemarikamafibixotetivadadajilomubelifulonijesoxekamokedagozolokibozojekopokusilozixulemuvatajakad&utm_term=otogi+spirit+agents+tier+list&fesivokofopudawigobagunejinekotelunozatefibatarapemerajegujedigegusopulenezananarop=tomimumaparuwoxokurubetekepolusoxesujosokagitesigakofenPDF link annotation
    • https://img1.wsimg.com/blobby/go/4643bb1e-878e-44f6-a536-ccd623e707ba/downloads/zefujawinemiravibedon.pdfIn PDF document text
    • https://adservice.google.ne/ddm/clk/426382440;228185261;d;;%3F//img1.wsimg.com/blobby/go/8eb4f5dc-77d3-4ee8-a988-d725a7bf3286/downloads/betokixus.pdfIn PDF document text
    • http://adservice.google.com.tw/ddm/clk/466651624;272226156;i;;%3F//governing-texas-3rd-edition-by-champagne.onlychelseawaves.com/vamivadasaliriv.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/4a1acfb1-c416-42d4-b0b6-356c7642351a/downloads/57511360286.pdfIn PDF document text
    • http://adservice.google.sk/ddm/clk/408405163;208572896;n;;%3F//bekov.preciouslifemedctr.org/5647845.pdfIn PDF document text
    • https://adservice.google.la/ddm/clk/408405163;208572896;n;;%3F//the-gateway-process-pdf.duxezawu.cfd/bubifijo.pdfIn PDF document text
    • https://adservice.google.co.kr/ddm/clk/408533097;208818505;l;;%3F//img1.wsimg.com/blobby/go/d4f6d970-3ffb-4fc3-839e-aeed4b5ffe02/downloads/17186095367.pdfIn PDF document text
    • https://adservice.google.mn/ddm/clk/445204615;249060672;c;;%3F//img1.wsimg.com/blobby/go/8e002e63-18f7-48b6-9837-a892e83be43a/downloads/6011173585.pdfIn PDF document text
    • https://adservice.google.kz/ddm/clk/448794861;252804937;a;;%3F//img1.wsimg.com/blobby/go/4a1acfb1-c416-42d4-b0b6-356c7642351a/downloads/vuzuvawinoza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off000ac4e7.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000ac4e7.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000ac4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC4E7 16344 bytes
SHA-256: 5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58
font_01_sfnt_off000adae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADAE1 10092 bytes
SHA-256: 4f6a75c9d267a7c6faac895466fe761eea50c537f0f606ce37d6644d04105f2e
font_02_sfnt_off000af173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF173 16700 bytes
SHA-256: 71487463af6e415d2e718a3f000c78fe96d8f58220e828879fbfe4ec5dcc163a