Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d765fe6111e330b…

MALICIOUS

PDF

70.9 KB Created: 2020-12-16 21:43:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4a20f2b4e12a4a659994768ad79daebe SHA-1: 7fa58d517b1763d84b78d6ed8b5cb572fdc68a07 SHA-256: 7d765fe6111e330b43293d1fb66eed65a418a9cfcd1ebf322721e0ab34ae8798
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffine.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a 'magic item compendium trove'. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=magic+item+compendium+trove PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f93580d6d6c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_5fc9b1b08c78e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496607/normal_5fb53edd9c2b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465702/normal_5fb750f003e35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403947/normal_5fa91b8454aff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5f8f312e1b1ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5fa21ee1d0daf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc11ea5a87939686409a0fa/t/5fc5832f3570fb44d1beebab/1606779696836/xupalikipuno.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf2d63de407d5e35cdc3e1/t/5fd61273164d0f203c71ee7c/1607864959482/bamboo_sheets_queen.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/82987177562.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/wogipefitojobi.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/vocabulary_for_high_school_students_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA57 5128 bytes
SHA-256: f10fdeea249717a3a91cd0fe67a1c91145e04e7ad8e7b4df8890bb0ff5505e7f
font_01_sfnt_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 10932 bytes
SHA-256: 071810135c8ba72c1d89ad463bfaa5229426d877c2c87139a0e64ab0a9522a60
font_02_sfnt_off000100ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100ED 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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