Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b28e07b103fe2d6…

MALICIOUS

PDF

67.9 KB Created: 2020-12-30 02:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 367906a8515f82947a5a19f6cb4b3b1d SHA-1: d6666f02126886af6563a44e9a8dcb28817d3152 SHA-256: 4b28e07b103fe2d6c7bd14fcba15656bc76d4ea2f01ba01a11ec433054922f73
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a mass of external links, including one pointing to 'trafftec.ru' with a query parameter suggesting a free movie download, likely a pretext to redirect users to malicious content. The PDF structure itself is suspicious, with duplicate object bodies and a high number of embedded external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=inglourious+basterds+free+movie PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/cKHzWhd/kuvosozorasibopa.pdfIn PDF document text
    • https://rofowijajexer.weebly.com/uploads/1/3/4/4/134476616/gexubijejo_dubogujuzexi.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/YUXNhjF/dude_perfect_football_video_game.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/4546be6f-0a4f-4964-8da1-313b5df36a5b/diagrama_de_caja_y_bigotes_interpret.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/wazuneni.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/34879353584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/579b781f-3800-4f04-a37c-120e32041e74/widozirijebabufuwikoduz.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/rufabunipaxobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60ec222-dc65-43e8-a9aa-55c5181a7e0f/48448901494.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/47089748264.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a1f94b-7e1a-4c08-9eb1-0f9d08be1a8c/nupavipukaf.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/telecharger_attestation_assedic_employeur.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_off0000cc61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC61 5364 bytes
SHA-256: 433a9ecf49b63e4dca13b03472f3bfca5dc881bc0a4f6990bd3cf6a1bffc6186
font_01_sfnt_off0000de95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE95 10572 bytes
SHA-256: d502b5242379571124a3d54f634b982bb401bb75ba7d3b9475cd40e7c90fab59

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