Malicious PDF — malware analysis report

Static analysis result for SHA-256 040fdfdacad4d271…

MALICIOUS

PDF

72.6 KB Created: 2021-02-19 22:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 09c2be435d8197d5f41188f5455a1885 SHA-1: 4b212f3ddcb185869103cf19d35e16f70f51ba83 SHA-256: 040fdfdacad4d271605d313e3769419568148fde09a6264879c08309d0d35597
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable domains and link farms, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious content.

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://maypoin.ru/strik?utm_term=2006+ski+doo+tundra+owners+manual PDF link annotation
    • https://fosijegaden.weebly.com/uploads/1/3/4/8/134868146/eb17144a90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393044/normal_5fcf3042476b1.pdfIn PDF document text
    • http://lajulufubugo.22web.org/tools_damage_report_format.pdfIn PDF document text
    • https://cdn.sqhk.co/dorodidur/dfUcWia/17603694810.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/gsgiI6n/rinenanerivodovitufifup.pdfIn PDF document text
    • https://munelexogetajax.weebly.com/uploads/1/3/1/4/131437313/11cd0803843c1.pdfIn PDF document text
    • https://pojadobaga.weebly.com/uploads/1/3/4/8/134853930/012f4f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_602a422f5aa19.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/ec8011999bc.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/3thbmc9/75745881780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497358/normal_5fcdd29d06d42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456666/normal_5fe3c92688155.pdfIn PDF document text
    • http://idealica-ordina.site/vafugomexoxuxud0j1yh.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/higcjey/7138986664.pdfIn PDF document text
    • http://nijopepeviliwe.22web.org/dell_7010_sff_service_manual.pdfIn PDF document text
    • http://card2card-perevod24.site/brescia_juventus_le_formazioniy5aot.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/vazisi/5827626010.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/pagodibubok.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/63776421864.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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 5460 bytes
SHA-256: cba6a53fbc774627080370acb5cd7b1e678a2d6f75833d009c53cb8dfd608aa4
font_01_sfnt_off0000f128.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF128 10512 bytes
SHA-256: 2f6638a3707534c6e715a35a7f8acbd546d3b6da2cbee558457504e259ed2995

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