Malicious PDF — malware analysis report

Static analysis result for SHA-256 50573b1178f8d557…

MALICIOUS

PDF

75.8 KB Created: 2021-01-06 10:29:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dedbe3d9a063693c24ad6862c519c15 SHA-1: 774c6a0a553d3403fd8bb63ab56c74059d8a488f SHA-256: 50573b1178f8d557c35de94160470032e5128647742e079ce362bc210ca04682
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely part of the phishing lure. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=lippincott+manual+of+medical-surgical+nursing
    • https://static.s123-cdn-static.com/uploads/4414167/normal_5ff093fb4de9b.pdf
    • https://cdn-cms.f-static.net/uploads/4420760/normal_5fdb3a516e339.pdf
    • https://cdn.sqhk.co/jakufomego/WJLqEaS/86865631591.pdf
    • https://static.s123-cdn-static.com/uploads/4425723/normal_5ff28d1325abc.pdf
    • https://cdn.sqhk.co/puwetudul/czihgcG/phoenix_weather_late_november.pdf
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fb5db45f22e1.pdf
    • https://cdn-cms.f-static.net/uploads/4447087/normal_5fb67ce7c5a3e.pdf
    • https://cdn.sqhk.co/lojosewude/ikkjgQs/welelikuvegunog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/loxopudizus/saxugobukulosefikexozurer.pdf
    • https://uploads.strikinglycdn.com/files/8b1c2199-483d-4751-aa57-d4cb3617dcb1/ironheart_2020_cancelled.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecd7.bin
2e08a999d137e58a996010f56acbaac92651506d617fedc4196cb362d2216205		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 5448 bytes
font_01_sfnt_off0000ff51.bin
e89f06835dfb07728d2cf98f6ef679e1bbb3c97cca85bfd222a16d750153210d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF51 10228 bytes

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