Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfb5d26199cff53…

MALICIOUS

PDF

72.4 KB Created: 2021-02-26 22:26:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 972a634482c1c273485a2fcb6f102b99 SHA-1: c016bf74df0385c38db14620056eba10a15aa190 SHA-256: 2bfb5d26199cff53628800405e3f63066e980f55518b01eb83e148e7618b6d87
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/award?keyword=sherwood+rx-4109+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4412900/normal_6006db4a61433.pdfIn PDF document text
    • http://joteruzawareba.iblogger.org/bsc_magazine_january_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/xetosusaxi/ijjajjE/61327770619.pdfIn PDF document text
    • http://cyberlife.store/rovagidulizagumexarwpk7z.pdfIn PDF document text
    • https://cdn.sqhk.co/lijusute/ha2zgi5/xadupe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415302/normal_5fdf38e489807.pdfIn PDF document text
    • https://lodokevez.weebly.com/uploads/1/3/4/4/134476034/vepeli.pdfIn PDF document text
    • http://gexezagabakit.22web.org/lebipepivutitebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofepabozamawur.epizy.com/55112408838.pdfIn PDF document text
    • http://gofanukeguwul.epizy.com/jodivisigidaxova.pdfIn PDF document text
    • http://vakisetituli.rf.gd/ropakex.pdfIn PDF document text
    • http://filezigubala.rf.gd/5474673420.pdfIn PDF document text
    • http://guwivuvasexi.epizy.com/28397514768.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_off0000df54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF54 5620 bytes
SHA-256: 2051e2d80d6ddb0d423b2da7e75871a2515061780bfb47fd661ba9640b7e9933
font_01_sfnt_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 10184 bytes
SHA-256: a893026f1f46bf4aac61fa71912eeadc378de312c91af87eebd861bb49905663

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