Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d02171564be02bd…

MALICIOUS

PDF

82.2 KB Created: 2020-12-24 07:24:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5af855027dd99f875c3bfbbf1c1705f4 SHA-1: b718e9cf26a7f83d1e2f1738a32a118056d274ff SHA-256: 9d02171564be02bd22d4eecefe7763d1b4fbb077eb3fda6af8d3f7029082037c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the presence of embedded URLs and the PDF structure strongly suggest it's designed to redirect users to potentially harmful external sites.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=kitchen+knives+uk+amazon PDF link annotation
    • https://kisetujetu.weebly.com/uploads/1/3/2/8/132814277/parafozomijal.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/SYifB3y/race_car_driver_killed_yesterday.pdfIn PDF document text
    • https://xitapazutirubej.weebly.com/uploads/1/3/4/8/134882608/wosuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499341/normal_5fc8043a783eb.pdfIn PDF document text
    • https://cdn.sqhk.co/dumoniriwo/6hhV6ml/dofagaladijegiwojesaja.pdfIn PDF document text
    • https://cdn.sqhk.co/dejenuluzew/hdRwFih/gestion_d_une_entreprise_individuelle.pdfIn PDF document text
    • https://cdn.sqhk.co/kopizikob/bR04khi/jikafejopijelig.pdfIn PDF document text
    • https://cdn.sqhk.co/fegujajox/gcjbMih/72543742771.pdfIn PDF document text
    • https://cdn.sqhk.co/nezafomura/HdnifbS/24329297732.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/b392a65.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392656/normal_5fe099e3d9988.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/4d913b1e-5cb5-421e-b9fc-de88a43daa03/88658132574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e799208-3540-4822-89ef-f3c705bee868/84404035605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c7772e-f8cc-4db0-b9bf-6e4542810393/campbell_biology_in_focus_ap_edition_examview_test_bank_assessment_suite.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_off00010439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10439 5056 bytes
SHA-256: b22694bf06959a3cfd12fa3c4d6ba3ed9d7145c953bf7112bace34add9d61c03
font_01_sfnt_off00011558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11558 11448 bytes
SHA-256: f8b72c737010ce58c1367f49a2e945b6f15aeefedabe677774a25004ad031b2a

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