Malicious PDF — malware analysis report

Static analysis result for SHA-256 dedc02132d368e96…

MALICIOUS

PDF

65.8 KB Created: 2020-11-22 22:06:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2879ecf0e34efe0700f6b0bf7e3e27 SHA-1: 1b23e951d5bb6ecbd878d2a48f83b6304709b6b1 SHA-256: dedc02132d368e96c3293ef300d829a1abbcebeef5e1929281edfa728e457b34
96 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ClamAV and an ML classifier, with a high risk score. 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 an instruction manual, consistent with a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=maytag+neptune+instruction+manual
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fa2ddefbd8f3.pdf
    • https://cdn-cms.f-static.net/uploads/4486969/normal_5fba0b114400b.pdf
    • https://cdn-cms.f-static.net/uploads/4411918/normal_5f93e659c0215.pdf
    • https://cdn-cms.f-static.net/uploads/4379718/normal_5fad149629cba.pdf
    • https://cdn-cms.f-static.net/uploads/4424029/normal_5f986f6e73d13.pdf
    • https://cdn-cms.f-static.net/uploads/4368972/normal_5f90feebc375a.pdf
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f8a8ba67a2a3.pdf
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fb5d6eac8556.pdf
    • https://cdn-cms.f-static.net/uploads/4412768/normal_5f9eafb207a2b.pdf
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5f8d241e628ab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/965bf53d-cbeb-470b-bad1-37d4b8db5629/vw_manual.pdf
    • https://uploads.strikinglycdn.com/files/5f5ad3fe-34f9-41c0-9ea8-66df007e09b1/89934303952.pdf
    • https://uploads.strikinglycdn.com/files/3f7b02c3-6dfb-4da2-9e7c-f6538bab7717/75658606773.pdf
    • https://uploads.strikinglycdn.com/files/97a028de-eb7f-4c3f-b2bc-a2dca06da24a/39726696175.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_off0000c689.bin
b588d54434d4ab25322a824f57e35b3c16849cf929670721ddfdaaee2de27eca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC689 5360 bytes
font_01_sfnt_off0000d8c8.bin
03fee7a96dd252a0c65a3d5f5a623497e2c05cadc66cb795a3a8c25b7d408e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C8 9900 bytes

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