Malicious PDF — malware analysis report

Static analysis result for SHA-256 2644e3d5975b92f3…

MALICIOUS

PDF

67.9 KB Created: 2021-01-03 22:30:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: be716f6635f0a3fd98e1d987b0fcc366 SHA-1: dd33f8ef227906109b060965662cac52404df9d8 SHA-256: 2644e3d5975b92f3eeedca649886d36094dab7c60640bd3c5fe46126ce257d5d
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=learn+old+english+with+leofwin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375703/normal_5f945da7aca20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411923/normal_5fcdb78843f8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475995/normal_5fa56d76de879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_5faf51bc9b652.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5f9d536489123.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/Xajg19F/fruit_master_village_master_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5fad615b7a829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479226/normal_5faab99d6fb11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486963/normal_5fb35a6e29c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459165/normal_5fb34d8480691.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379603/normal_5fcea32aba18d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5fb27d4ee69de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pipaneku/38948456103.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/88482267433.pdfIn PDF document text
    • https://s3.amazonaws.com/sowewazulejewi/nunofibuxezarutagemogoto.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/67181583798.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_off0000c9a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A3 5336 bytes
SHA-256: aea19a81028c7b67b74fc48261a84b5db7605e3ab466096f8223c31517d5d912
font_01_sfnt_off0000dbde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDE 10764 bytes
SHA-256: 725a3fdf77547c0212858119d94c908ecb73b08a3cd29f61f7dde86c8c225ee4

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