Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 467cba8cfe33e711…

MALICIOUS

PDF / .VIR

366.7 KB Created: 2023-03-17 02:38:24 Authoring application: Scribus First seen: 2024-11-16
MD5: 7bb5ead9f83ab4473571b0a4809dfffd SHA-1: d1c49f75a090fe84accbef24d5fd050bbd7c4a68 SHA-256: 467cba8cfe33e711b7fe0344fd57deae00b12da8f184ec0e75a32f931a911836
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating malicious intent, including random and SEO redirector links. The primary malicious URL, https://zasepufakuzub.octort.co.za/..., is embedded within the document and presented as a link to product instructions, likely a phishing lure. The ClamAV detection further confirms its malicious nature, classifying it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4094

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://health-science-chapter-2-study-guide.talkhockeytome.com/38246691671.pdf In PDF document text
    • https://powerpoint-chapter-1-study-guide.workforceok.org/xanuwopurenadubil.pdfIn PDF document text
    • https://adobe-premiere-pro-user-guide-pdf.moviespond.com/39921879506.pdfIn PDF document text
    • https://marketing-management-kotler-13th-edition-pdf-free.talkhockeytome.com/37838940793.pdfIn PDF document text
    • https://beanie-babies-price-guide-pdf.kmcgphoto.com/50189294541.pdfIn PDF document text
    • https://zasepufakuzub.octort.co.za/823741677066351889?tipubivitebasutexerekixedojakudigupibitegibegimiwemokumutazifuzudejomowarula=bosadizukoruwuxemugabologelilodijunolisiwamewawowekavawalufifebuvivetofopulapunikeputowudijajelelovotiruritegejiwimaraxaketigoviniweketenupiwojizunotinoziwawatizimamorasogebaperapogafedesokurerewidatit&keyword=oster+rice+cooker+instructions+3+cup&xuzikopafozerodapiterurepukisonotevedazutujogujejulikilodelitesusatokubifopapebefupazivoneja=jafikezutibovetujamukoxomekebejidalilewafekigumolijapedebirozigivanunodojemegubosodetenukodozojuzazexegikosaliIn PDF document text
    • https://zasepufakuzub.octort.co.za/823741677066351889?tipubivitebasutexerekixedojakudigupibitegibegimiwemokumutazifuzudejomowarula=bosadizukoruwuxemugabologelilodijunolisiwamewawowekavawalufifebuvivetofopulapunikeputowudijajelelovotiruritegejiwimaraxaketigoviniweketenupiwojizunotinoziwawatizimamorasPDF link annotation
    • https://zasepufakuzub.octort.co.za/823741677066351889?tipubivitebasutexerekixedojakudigupibitegibegimiwemokumutazifuzudejomowarula=bosadizukoruwuxemugabologelilodijunolisiwamewawowekavawalufifebuvivetofopulapunikeputowudijajelelovotiruritegejiwimaraxaketigoviniweketenupiwojizunotinoziwawatizimamorasogebaperapogafedesokurerewidatit&keyword=oster+rice+cooker+instructions+3+cup&xuzikopafozerodapiterurepukisonotevedazutujogujejulikilodelitesusatokubifopapebefupazivoneja=jafikezutibovetujamukoxomekebPDF link annotation
    • 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_off00056424.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00056424.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056424.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56424 18116 bytes
SHA-256: a06ba5ae8cebe220a17cb20adfe17a1167d97ae6f5cdbba54ebbc8c9edc514f5
font_01_sfnt_off0005935c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5935C 10544 bytes
SHA-256: 7955f32a59c57369633b1c3bae4e97321055ac3834c9b77a9403adaade742bfe