Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b51b06bb95f2cd…

MALICIOUS

PDF

68.9 KB Created: 2020-12-29 21:30:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 31e6698ac95f1c1dbadefd098a31043d SHA-1: 89774475cd89148aae2dbe0620b1b4176f040986 SHA-256: 42b51b06bb95f2cdbce3f08ba9a5d27bbb8b94e7e6ef6490dbe04f24abd50c15
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL pointing to 'trafffe.ru', which is likely part of the attack chain. The document body is heavily obfuscated, but the presence of the malicious URL and the strong detection signals suggest 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/strik?utm_term=uncivil+warriors+youtube PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445107/normal_5fb94109595cd.pdfIn PDF document text
    • https://cdn.sqhk.co/folamudoj/ijbBVRV/59448751071.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/ethhRO3/wifekivizalizenawoniz.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/8rihzxg/thief_master_phone_game.pdfIn PDF document text
    • https://cdn.sqhk.co/titipubaduw/ghp7ogg/jelly_shift_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5fdb2184e915e.pdfIn PDF document text
    • https://cdn.sqhk.co/xowuzaseku/R1K8Rvv/call_me_emperor_ministers.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/964e4831-3eb7-466f-b590-4177a6d94fc7/ikemen_sengoku_otome_game_anime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7888f1e3-6c33-4484-a981-b67a32e0daca/74923838559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e2b583-0c42-42f5-a109-926a9c24c3e5/amazing_race_canada_2019_episode_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b18da3-bf01-4746-9a3e-7929fcd7861e/vivo_black_manual_height_adjustable_standing_desk_frame.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/kezumokewafuwoxagegimuvez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bec5b80-964d-46fa-8682-80600d3aabdd/vepeten.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b35014ed-3bd3-4c12-9faa-f92b3a71066d/ripuvu.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_off0000d187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD187 5176 bytes
SHA-256: 6f752ecc760d3e5086653b76b54344977b4585b4905fc792d8e2aa456a2b244c
font_01_sfnt_off0000e34f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34F 10384 bytes
SHA-256: 5e04b0769c1042ffb42708189734194255fe89064db4713b2ba8f6a183134e50

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