Malicious PDF — malware analysis report

Static analysis result for SHA-256 c70f9b9606fc8ef2…

MALICIOUS

PDF

59.1 KB Created: 2020-11-20 22:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 5a5047625b095dfceb7e3da81985aff4 SHA-1: 1b653a93f2d86bbc3d1a884211aa1c1f1f3bdebc SHA-256: c70f9b9606fc8ef2bbae0994ed629335aab0f558d32d2dc3519cf6759979458a
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafffe.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'Sanyo mini split manuals'. No scripts were extracted, but the PDF structure and embedded URL are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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=sanyo+mini+split+manuals PDF link annotation
    • https://zeronifoza.weebly.com/uploads/1/3/4/3/134312515/408a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367300/normal_5f9688397ba90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382966/normal_5f8e373949c6e.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/4106527.pdfIn PDF document text
    • https://wipomozexabezi.weebly.com/uploads/1/3/0/7/130776841/5530656.pdfIn PDF document text
    • https://gijufonuvaxi.weebly.com/uploads/1/3/4/8/134874477/9570934.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/5888e304-c2b9-4d9e-840a-b6a7bb134ba4/camps_des_matelots_versailles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f22fce94-42e6-48be-80fd-e4947c2664e4/resirujesemojisuweve.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/airtel_digital_tv_channel_list_with_price.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_off0000ac9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC9B 5076 bytes
SHA-256: 71364229e3c9b1a343028b45936c795b2d0cfc1a048b783031c96a0624f574d7
font_01_sfnt_off0000bdd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDD7 10008 bytes
SHA-256: e5a4fcce6eca8cc4267b786627fde6bb63664b112f64fe86b2a4ade723157caf

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