Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5f89ec8823c954…

MALICIOUS

PDF

72.2 KB Created: 2021-02-28 11:02:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 3f29245f0c524bb102518936e6de7bea SHA-1: a4dbca113a584f97342ee7f0a3d892ba7a89a186 SHA-256: 7c5f89ec8823c9548baed236f316538c11ab0a7b98aedcb2896c4c2e7122e743
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or redirection infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://fokemale.ru/strik?utm_term=downgrade+ps3+ofw+4.85+to+3.55 PDF link annotation
    • https://cdn.sqhk.co/zalopubid/cYIidU9/dobolexamowurewijazi.pdfIn PDF document text
    • https://cdn.sqhk.co/nejibija/Igdhjjj/cbz_xtreme_bike_hero_honda.pdfIn PDF document text
    • https://bebojeraje.weebly.com/uploads/1/3/5/3/135302211/totipuv-wudofo.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/como_consertar_um_fone_de_ouvido_da_apple.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/pickett_slide_rule_n600-es.pdfIn PDF document text
    • https://molemopiwe.weebly.com/uploads/1/3/1/8/131856052/ae01e46ec.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabudoxuwa/ePijib6/23177409477.pdfIn PDF document text
    • https://migobagola.weebly.com/uploads/1/3/4/8/134874333/kukitidawuj_gupeberej_kunalebetumi.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/Thgnnid/risimimosatudim.pdfIn PDF document text
    • https://girenofozajete.weebly.com/uploads/1/3/4/4/134476001/jobuxevopulopavo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobanunep.myartsonline.com/63917718173.pdfIn PDF document text
    • http://dulanorelowekat.epizy.com/christine_hine_virtual_ethnography.pdfIn PDF document text
    • http://zazuxevepiz.rf.gd/47962930866.pdfIn PDF document text
    • http://fagewoxe.epizy.com/99116454285.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d88a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD88A 5868 bytes
SHA-256: 3b66a66ae1c6b1b7d3e27fe840086029b194ca38a4289ab100c388b408a9f0ee
font_01_sfnt_off0000ecbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBF 11992 bytes
SHA-256: 4a9eb7ce0ec6bf3d03d7fcbb20ff9be1b8624baa9d88826640f28aba683e158c

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