Malicious PDF — malware analysis report

Static analysis result for SHA-256 8592663bdfcb4647…

MALICIOUS

PDF

75.9 KB Created: 2020-12-22 19:52:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8ef97d572c6e4804709c5fa0ff11f80 SHA-1: d2a6b5d2516d09ca16557163b64b7a7c65f085d5 SHA-256: 8592663bdfcb464749028e62ff90dc129620f8284e17ac34e3dd93da18d10544
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafffi.ru', which is likely a phishing or malware distribution site. The heuristic 'SE_URGENCY_LURE' suggests the document's content attempts to create a false sense of urgency to prompt user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffi.ru/strik?utm_term=adidas+nmd+white+mens
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8e905ae5e8a.pdf
    • https://cdn-cms.f-static.net/uploads/4374835/normal_5fae8ce027c58.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc2a453cd1e280355df5d9e/t/5fc3bef6bc819f1cf44ad0ea/1606663935042/5017597544.pdf
    • https://static1.squarespace.com/static/5fc3aed99955c744b54ce5b8/t/5fcaf12a7ab0f364aba2ad8b/1607135530243/58125196400.pdf
    • https://uploads.strikinglycdn.com/files/a673b1ca-eb37-4feb-88e2-526e237f479b/high_oxalate_foods.pdf
    • https://uploads.strikinglycdn.com/files/90b430e2-e052-45ae-9b9d-7c9e33930cb2/spider_boy_san_andreas_crime_city_game.pdf
    • https://uploads.strikinglycdn.com/files/2c4dc61f-8c52-4f1d-8556-71f821922e05/20557232898.pdf
    • https://uploads.strikinglycdn.com/files/6dc8901d-dc88-4fb8-aebb-279defd9879c/introduction_to_agribusiness_management.pdf
    • https://uploads.strikinglycdn.com/files/09fd147e-31f5-401c-b9a0-23b9c1d2de35/chaco_canyon_map.pdf
    • https://s3.amazonaws.com/didowugorokirug/multi_region_dvd_player_codes.pdf
    • https://uploads.strikinglycdn.com/files/cf5657c0-c379-46c1-b52f-d99f944a395c/48145948855.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/candy_crush_saga_hack_game.pdf
    • https://uploads.strikinglycdn.com/files/e3674279-945c-4d39-83d0-f25a8cb62301/65360517219.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_off0000ec3b.bin
947919d8672e2de2c0863bbd742b3c5cb5df672514a40da1db904ff4d4bb748d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3B 5020 bytes
font_01_sfnt_off0000fd3a.bin
1b988ab0d8bd8918ebc264c42ce1ad0dc503b06b6188a9d4cdbcda44edefd1f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3A 11076 bytes