Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3a6ba57af58b5b…

MALICIOUS

PDF

61.2 KB Created: 2020-12-18 07:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 81d829b49e0212652b2cf100416191f5 SHA-1: efc57c3fa89818c1bae9cb5015de752820f4299a SHA-256: 7f3a6ba57af58b5b880b367294e9e2ba2347370840d6d72c82aac8f5fe088644
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to a game hack, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffe.ru/123?utm_term=stick+war+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369903/normal_5fb03d8c125cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454547/normal_5fb4a8a54dc76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484358/normal_5faafff279c49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484399/normal_5fb8ee80ac884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487631/normal_5faf5a22aa7b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451350/normal_5fcd51a0cd2dd.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/b3df495e-0ff5-4c12-810d-7f0136d0663c/phet_skate_park_basic.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/61620597307.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/rewoxami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c661aeb7-440c-428f-a415-95ce6dee58af/99409622972.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/nezixuta.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_off0000b62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62D 5076 bytes
SHA-256: 698a12884ff602614ad5c342d09868df6c802f62da00fdb18afe98b7f05e902b
font_01_sfnt_off0000c784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 10396 bytes
SHA-256: 420f87d14f9aec21a3480ada83741356cdd0c7c5920d0fc4ae41564bfb015419

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