Malicious PDF — malware analysis report

Static analysis result for SHA-256 a643c4e49e9aafb9…

MALICIOUS

PDF

239.5 KB Created: 2021-01-26 08:23:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a560bca5a46c0fd3d70ecf3332d5f5a5 SHA-1: 1a43b7efecbe4539ade6f06e1626c1da8b45b178 SHA-256: a643c4e49e9aafb994a287ddb09605d28e16c706c992ac544e08ce42b15f1632
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to a technical query ('What does code e 9 mean on accu-chek aviva'), suggesting a lure. A high-priority heuristic indicates an image lure linking to an SEO redirector, which resolves to the URL https://trafftec.ru/123?utm_term=what+does+code+e+9+mean+on+accu-chek+aviva, likely serving as a phishing or malware distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=what+does+code+e+9+mean+on+accu-chek+aviva PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4491445/normal_600d8b2642929.pdfIn PDF document text
    • https://zeberafuduzugag.weebly.com/uploads/1/3/2/6/132682167/motewumobif.pdfIn PDF document text
    • https://nanewibogexuro.weebly.com/uploads/1/3/1/3/131382113/zevawunetigit.pdfIn PDF document text
    • http://lazadacostumercenter.com/momogusbg7ti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fd9bd0266f14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_5ff258c19d37b.pdfIn PDF document text
    • https://waxukazo.weebly.com/uploads/1/3/1/0/131071095/bc6d498321e4.pdfIn PDF document text
    • https://nevofegef.weebly.com/uploads/1/3/4/8/134851200/rasibivejux.pdfIn PDF document text
    • https://sewizafisebe.weebly.com/uploads/1/3/1/4/131437566/kerimopavoxazibutun.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/pabeniwaxavojakex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477864/normal_5fd968aeb6027.pdfIn PDF document text
    • https://vuzipelafow.weebly.com/uploads/1/3/4/6/134688966/406241.pdfIn PDF document text
    • https://cdn.sqhk.co/pulizojiwim/cwn5VDy/mevimaxuwuxoretogibudi.pdfIn PDF document text
    • https://pifujikis.weebly.com/uploads/1/3/4/8/134875168/mofuda-joduxi-fuxip-mopunijaru.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/sesafefanulokam/free_agile_roadmap_powerpoint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dofufiri/telugu_bhajanalu_songs.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_off000373c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x373C4 5376 bytes
SHA-256: 105e24c5fd6f6f97927207b3560f5f665e9be1e17dd719e790143eb6a0633116
font_01_sfnt_off000385fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x385FE 12268 bytes
SHA-256: 0070a13b7de40e9b5c459a4cbd39d59ec337d99ee51f28a54d04d5d0829753a5

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