Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c2f6c372a48bc9…

MALICIOUS

PDF

77.6 KB Created: 2021-03-01 01:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 78175e82c712ee3c088a8e9040bb22da SHA-1: 07a6eb0574f19c6c0fff2f42a02b34b5cde8da06 SHA-256: b5c2f6c372a48bc954b312437b7a753172bdf32aff28ae166bca4fb507185273
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document uses a lure related to a 'blood type diet' to entice users. It contains numerous embedded links, with at least one pointing to a suspicious domain ('securityofusersdevicesonline.site') and another to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://lozipotod.ru/award?keyword=blood+type+b+diet+food+list+to+lose+weight PDF link annotation
    • http://dkblogin-de.best/80264126614thmm6.pdfIn PDF document text
    • http://lofitner.buzz/49374642271emnpv.pdfIn PDF document text
    • http://ovca.space/wiloduvenusesazezibatbhogy.pdfIn PDF document text
    • http://normab-id.com/81740373687055wk.pdfIn PDF document text
    • http://lnstagramcentre.net/reworivnnbgk.pdfIn PDF document text
    • http://poradoit2.site/24168642049px9in.pdfIn PDF document text
    • http://brumbum6.xyz/128498311948z06n.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/uncle_ato_mensuro_worship_songq7imf.pdfIn PDF document text
    • http://normal-id.com/618270620246o4uu.pdfIn PDF document text
    • http://table-wait.com/vascular_malformation_classificationnips6.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/94921655634.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hgDggha/wood_cutter_table.pdfIn PDF document text
    • http://world-wildshop.com/4973892932996mm8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419818/normal_5fe05364941e0.pdfIn PDF document text
    • http://titanof-filtr.ru/mastoiditis_akut_adalahqdxzi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF305 5380 bytes
SHA-256: 7c08e04b1cac8c3f1ae9d3e4247b8932b7a9f08618373a7e6f85f3ab74fa88d3
font_01_sfnt_off0001056e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056E 10380 bytes
SHA-256: 36fd90a3a95fd726c73df8e00448eb04d168576df68e864a6ef95a5f36c86d70

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