Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc00a5b3d19322ce…

MALICIOUS

PDF

68.6 KB Created: 2020-12-16 21:19:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 0315d41af54a65ddb907fb2752314db8 SHA-1: 76b757d85a6844578b559b970c6ee3ed9d9d5843 SHA-256: cc00a5b3d19322ceb6d10bdeec3981c998ff27950d271cfbb75e875c5db272d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/123?utm_term=tesla+369+method PDF link annotation
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/6742924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_5f951ba4bdb0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f8f9c3377ab4.pdfIn PDF document text
    • https://xesexudojol.weebly.com/uploads/1/3/4/8/134883831/5315203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5fa406ec340cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/51b09a37-404c-4336-94f5-cfc9f7ddf288/13852467097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aac0ce05-bb94-47cf-81a9-dc37070369c3/jikibinilazibex.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/photo_adapter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/sputnik_sweetheart_murakami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fca5874-c89c-4ebd-83d6-1dc76942910c/diy_wheel_alignment_turntables.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/palau_musica_catalana_guided_tour_tickets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a395e0d-bbd2-4b1b-8de9-754edee29bb6/cafe_escapes_cafe_mocha_caffeine_content.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 5392 bytes
SHA-256: a93994c353117629906d69cf3e2910647b5a2fa50de54d0afae505d89e58d1b7
font_01_sfnt_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 10396 bytes
SHA-256: 8739cebbd249d132983c465526296d1ab2e4f9b8ec42086461a885c281ba1d78

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