Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7834ed50ba4548…

MALICIOUS

PDF

66.8 KB Created: 2020-12-16 14:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 1cfdb7537598aca81c2e256c0ce19a27 SHA-1: 1bb16dd9bd6d0bf417ee358471171a5b1a8628f5 SHA-256: 6c7834ed50ba4548b2a416a6c4a803f50b2502c6e16f0b01701261bfc6d6b9b2
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://trafftec.ru/123?utm_term=age+of+rebellion+pdf'. The 'SE_CALLBACK_LURE' heuristic indicates the document may be designed to trick users into calling a phone number, consistent with phishing or scam tactics. No scripts were extracted, but the presence of external links suggests a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafftec.ru/123?utm_term=age+of+rebellion+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479445/normal_5fbb8701b3485.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470380/normal_5fc1520a17fae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5fa0d5a0bec2f.pdfIn PDF document text
    • https://zizipidefogin.weebly.com/uploads/1/3/4/8/134852386/bawosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5fa12f3b0b584.pdfIn PDF document text
    • https://fopimakalegej.weebly.com/uploads/1/3/0/7/130738542/dfe2dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5fc19d2d34b34.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5533cd26ff1194f914669/t/5fcd701cd235d37878da6521/1607299100589/vuxuratonino.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27abee9fc3622d52c1c80/t/5fc3e69708845d092401ab26/1606674075205/monster_of_the_week_book.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc795b181fec009684301eb/t/5fc93359e4f08425747ba6a8/1607021403244/5865909897.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6806ca3bf4b14abcfadcf/t/5fcb1be0a3bc3d19152940c5/1607146464670/febesoki.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5af33f75b16643cc7059/1606376180533/71931845137.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_off0000c9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CA 4948 bytes
SHA-256: b21506b51c3818c762f5ff5997d16734977c2fae905daaa474147f917167fc0c
font_01_sfnt_off0000dab2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB2 10664 bytes
SHA-256: edee5e20eabbd1ebdbb3e998317b66cbd6b98e3ec96ab45ebbe1cb3fcdb6125a

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