Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ce577a08bb2e3d…

MALICIOUS

PDF

67.3 KB Created: 2020-12-16 19:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 29bef9d1472270b2e61320dce9dc2218 SHA-1: 7cdb7da87723ecac0841b0ed1acc1340c818a40d SHA-256: f6ce577a08bb2e3de2ecf36378921baf818e6de40f98e8e51d31584dcd318337
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high-confidence ML classifier and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a link farm on disposable hosting, and the presence of 'utm_term' parameters in URLs like 'https://trafftec.ru/123?utm_term=ikea+frakta+bag+review' indicates a phishing or redirection attempt. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=ikea+frakta+bag+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413475/normal_5fcb6d611aa73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368731/normal_5f88181f4b8ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369932/normal_5f9cb1a76d06d.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/caa64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870f9c1e63e.pdfIn PDF document text
    • https://tixosame.weebly.com/uploads/1/3/4/5/134523113/8667380.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/poputimegelu_rikikagok_rewole.pdfIn PDF document text
    • https://wufipalowev.weebly.com/uploads/1/3/4/5/134595621/judawukimitor.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/baxadelefofibuz/22._integumentary_system_crossword_puzzle_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28ed02d-33a9-452b-9f3d-2a5ed2a5851c/jikasega.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/fruit_of_the_loom_hoodies_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/american_flag_stands_for_tolerance_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88caab62-db35-4b7d-9a7f-e35c920ea042/zeguru.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_off0000c702.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC702 5020 bytes
SHA-256: 5b2c0770ad3ba7a84ae578547ed615787915be0ffb4f8209cfaa65164b9e5aa2
font_01_sfnt_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 12776 bytes
SHA-256: 8687a2e08d5b5c5438811efe0a4df0927af45f57cdd55420028c15f2c27a9763

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