Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a2c61c4b52d0f61…

MALICIOUS

PDF

73.5 KB Created: 2021-01-06 15:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4f9f7e527274c766ae237657788b2aa1 SHA-1: c0cef1df434db3c861757d2d1da8f6cf2b6071e7 SHA-256: 5a2c61c4b52d0f613cab926a376382886807bc34820cccf8681a4f2ee8dfc3b4
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'black and white game mac'. No scripts were extracted, but the presence of external URLs and the overall detection profile strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/aws?utm_term=black+and+white+game++mac PDF link annotation
    • https://gejeliruvuke.weebly.com/uploads/1/3/4/6/134699680/06baffb7c296c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447087/normal_5fe20efe12c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386852/normal_5fbb0dad1d077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477147/normal_5fd665cf0fb14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366336/normal_5ff507b18d246.pdfIn PDF document text
    • https://pewarefat.weebly.com/uploads/1/3/4/3/134361746/44620.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lomuper/47214944177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8450025-6395-4b9b-babe-0ea1b678e627/chess_openings_for_black.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/adjustable_guide_die_stock_handles.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/zetujigizele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257dde40-fded-4740-81eb-5a0f29426204/toefl_itp_official_guide.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_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5284 bytes
SHA-256: 9feabd58bcbcdc09f3cb67de2f4fa3869d9d3079b5f241b5e43a6b20fea25e93
font_01_sfnt_off0000f545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF545 10584 bytes
SHA-256: d5541b44545e7a4cd7bfe1d58a30615ca68b0ff81a5c8849b9130f8950d4245a