Malicious PDF — malware analysis report

Static analysis result for SHA-256 941364a7b5101476…

MALICIOUS

PDF

79.2 KB Created: 2021-01-15 05:34:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 9fa1daf273c8d11e507da6522d921409 SHA-1: 4a1b0f55f9ff83699ac03c751395800eb25379ce SHA-256: 941364a7b5101476e0196a43e9b959ac83b35e8d8a414b10841fa2604ad7b9e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to 'Fallout 4 custom ini tweaks'.

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=fallout+4+custom+ini+tweaks PDF link annotation
    • https://site-1176323.mozfiles.com/files/1176323/mountain_lion_follows_runner.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/6187461.pdfIn PDF document text
    • https://site-1167986.mozfiles.com/files/1167986/amoled_mobile_wallpaper.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504047/normal_5fec93a4bb38a.pdfIn PDF document text
    • https://site-1084156.mozfiles.com/files/1084156/zowexizuzefinovigasazep.pdfIn PDF document text
    • https://site-1178304.mozfiles.com/files/1178304/55293115642.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5ffd6a9eeb9e4.pdfIn PDF document text
    • https://site-1168272.mozfiles.com/files/1168272/app_business_plan_template_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5fd330f5162a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fb307d7b55b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f9b5b70a6caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_5fa08f9d5e5d1.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/seriposuj/wimidisezifeden.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/lifoxizogolapujan.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_off0000f8b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B9 5048 bytes
SHA-256: c849638ddf6511cc8f7288f0fd1847b981174e076a6054e28c3160d4a1798c03
font_01_sfnt_off000109f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F4 10980 bytes
SHA-256: b8c6123392af284601fc22b2c298b5cdcde37f31b6924f8cd3b651f81f6cf5dc

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