Malicious PDF — malware analysis report

Static analysis result for SHA-256 e873864bd7a209a3…

MALICIOUS

PDF

70.5 KB Created: 2020-12-29 19:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e2c1ec5f2401fcfe9074f3073fe7fab1 SHA-1: 34802cbe98cd2006c86fcb6c97a764d2c9ede66a SHA-256: e873864bd7a209a34060f6a7b24dea8806f7b1c8c0f1d63797fcf6b5a74da346
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffset.ru/strik?utm_term=graphic+design+is+my+passion+meme+generator', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a crafted document for a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=graphic+design+is+my+passion+meme+generator PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415767/normal_5fda074aeed28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5f9a835d9393f.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/egh7phe/31483927868.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/jcFdieE/ultimate_car_driving_simulator_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5fbdd3f66b1ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4529977/normal_5fc9b0b78cd4b.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/22713028-f86e-46c0-a32f-59fcca15be8a/rule_of_9s_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8408e3-c316-4028-a076-55964b26ff87/84022735616.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/bilosalinikin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f9b31c3-e5cc-4d66-baa1-3b28f7628eaf/xuxelowos.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_off0000d650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD650 5588 bytes
SHA-256: 5a2063f665fd444ae9a6a314155d9e15f1197e76cf6ce126b74c2f25516891b3
font_01_sfnt_off0000e931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE931 10572 bytes
SHA-256: 34b8259c4008c51c69c3db95912cfeb909afc84b623b57e3d20587d787acb9c4