Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 ac8b5c9c0162c5a4…

MALICIOUS

PDF / .VIR

301.1 KB Created: 2023-10-22 16:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-10-09
MD5: b53c26b4f802f1fccf15daefc7227b34 SHA-1: e032a9d46e6411ce6c79f96015ad98f1ae3a9666 SHA-256: ac8b5c9c0162c5a4a32e163c77bfda41f992d5865737741adf84e2ab335fdfa6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3521

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://puxavofibopo.foaptoa.com/94672711064410105246611752?pavezofavajulazavunajaxowoxumuwekuxataputaxuwoxifivolupaxosidowimakajawagubened=nodasevafafezomizewilidazawapivogurawukeduzozokanugisugozivuroduwudilimamegupoduvomaderatisanoweziwajikitokawomubowasuvepejazezusoxujutinuvogubeziberoremifewiwonemepitixakojeperoxadizonusogesulonitasisexodu&utm_term=blender+manual+pdf+2.8&sepaboviresivupebufebupuzapan=rezurobesomuzitekedizumowapufalazopowurejevagawovizasovepogoxejasitaxoxapugemapubifaxexanizezusiwojusexojebuzegumofogelasavuwoporebobun In PDF document text
    • https://puxavofibopo.foaptoa.com/94672711064410105246611752?pavezofavajulazavunajaxowoxumuwekuxataputaxuwoxifivolupaxosidowimakajawagubened=nodasevafafezomizewilidazawapivogurawukeduzozokanugisugozivuroduwudilimamegupoduvomaderatisanoweziwajikitokawomubowasuvepejazezusoxujutinuvogubeziberoremifewiwoPDF link annotation
    • https://puxavofibopo.foaptoa.com/94672711064410105246611752?pavezofavajulazavunajaxowoxumuwekuxataputaxuwoxifivolupaxosidowimakajawagubened=nodasevafafezomizewilidazawapivogurawukeduzozokanugisugozivuroduwudilimamegupoduvomaderatisanoweziwajikitokawomubowasuvepejazezusoxujutinuvogubeziberoremifewiwonemepitixakojeperoxadizonusogesulonitasisexodu&utm_term=blender+manual+pdf+2.8&sepaboviresivupebufebupuzapan=rezurobesomuzitekedizumowapufalazopowurejevagawovizasovepogoxejasitaxoxapugemapubifaxexanizPDF link annotation
    • https://img1.wsimg.com/blobby/go/f2215a6c-0436-4d82-8033-c5d079398259/downloads/jazenuxofus.pdfIn PDF document text
    • https://jimdo-storage.global.ssl.fastly.net/file/fa722087-bf96-44f9-a2ca-e10b40072c89/85a7d8ad-3059-41d0-851b-f8954f177f79.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/f2215a6c-0436-4d82-8033-c5d079398259/downloads/76770956874.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_off00045e5f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00045e5f.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00045e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45E5F 12304 bytes
SHA-256: 1fe049c170364503bb64cd94b707ef45bb5693d45132ea1c78422cf5e1c6ea91
font_01_sfnt_off00047bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47BB0 16888 bytes
SHA-256: b8e82e478e38941f62c24b8fc219c9202f7d5b1189d8b5c70ccf72a183201673