Malicious PDF — malware analysis report

Static analysis result for SHA-256 8678ff10f065cb5c…

MALICIOUS

PDF

71.4 KB Created: 2020-12-24 12:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 48bfb7384d730254b3120a7a690f5220 SHA-1: e86224d13f8385066ea7ef36d6f1cd692df3fc03 SHA-256: 8678ff10f065cb5c53686726f7d07dcb087ab59207d4d55ca925e4bc613f820c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs and embedded URLs. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically. The primary malicious indicator is the embedded URL pointing to 'trafftec.ru', which likely serves as a lure for a phishing or malware distribution campaign.

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://trafftec.ru/aws?utm_term=cell+cycle+regulation+pdf PDF link annotation
    • https://cdn.sqhk.co/lizupasepafu/IJghicf/banipuwozupawa.pdfIn PDF document text
    • https://cdn.sqhk.co/wezikinupig/i7XnKia/rust_basic_survival_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/heigyhg/t_i_game_zombie_tsunami_hack_cho_android.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_5fa38781a159f.pdfIn PDF document text
    • https://cdn.sqhk.co/wubumeze/jj4geih/87994058239.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/gAhitdF/bevamukokamirepexokor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5fac5648b2161.pdfIn PDF document text
    • https://cdn.sqhk.co/gulijolane/EkF8ijg/fifolelezubijasisav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506063/normal_5fe088599c3fa.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/22aa3b2c-f075-4993-975b-06c7a4c9f6e7/14430289233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e9f2dc-d0f5-4923-8e3f-407c045e8d0c/4654177215.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5beb70f-77bd-4305-9dc3-1929073e75fa/remembering_whitney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eefa7ed9-8dd9-4981-87cc-dab30c623e71/ballet_at_home_youtube_channel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93f5fa55-3e52-4e51-95dc-e93235d36666/club_san_diego_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c9315d8-7a37-45d7-aab2-76e4f682f7b9/britax_asis_car_seat_instruction_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857ac640-3927-4fc1-b9e5-ea4426c2d1fe/dulororedeb.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_off0000dc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC54 5152 bytes
SHA-256: 9a9cbdc4613a2c403b72e9c9d8a17038dabf4e363f8480f3c1fe23f14625309b
font_01_sfnt_off0000edf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 10168 bytes
SHA-256: d5a8ed60cbc94272617ddfd8f3f9277477854e24d19c7f3cf9eabbff356b7fe7

Open this report in the interactive analyzer, or submit your own file for analysis.