Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8de57c7e119f5e…

MALICIOUS

PDF

76.0 KB Created: 2021-02-12 17:01:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a3631c0483d3bd5d97bb849ac7519341 SHA-1: 7e45f4160c2dcdf7c8bf7e85e92ae3056fce88a2 SHA-256: 9f8de57c7e119f5e2db59aaa8ab15ac286b9ab7c5c387300921d2605c4abced6
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains a significant number of external links, with heuristics indicating it functions as a link farm hosted on disposable domains. The primary purpose appears to be directing users to potentially malicious external resources, likely for phishing or malware delivery.

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://maypoin.ru/wix?keyword=alpha+gpc+reviews+bodybuilding PDF link annotation
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/f45ff7.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/gfPV9hm/peter_cetera_one_good_woman_subtitulada.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/MhdT2MM/paxusonigumasuwinoru.pdfIn PDF document text
    • https://cdn.sqhk.co/nixivezez/jdfjjha/portal_mod_for_minecraft_1._16.pdfIn PDF document text
    • https://cdn.sqhk.co/fujalapevame/ijdijja/uav_pilot_logbook.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/6832520.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/gcYGjeg/katunukavozefete.pdfIn PDF document text
    • https://xaxazusilu.weebly.com/uploads/1/3/4/7/134757455/af6327dfedd639.pdfIn PDF document text
    • https://cdn.sqhk.co/pumibavi/igc8iib/bovinovanegosevuz.pdfIn PDF document text
    • http://nanolenka.xyz/31893460058uqtw7.pdfIn PDF document text
    • https://bovuxugiz.weebly.com/uploads/1/3/4/9/134901291/lalelewimulaw.pdfIn PDF document text
    • http://roflan.site/patobovusupowime02xf5.pdfIn PDF document text
    • http://prod-fruit.space/photonic_crystal_fiber_bookzysiv.pdfIn PDF document text
    • http://sale20.site/factsheet_meaning_in_english02716.pdfIn PDF document text
    • https://xubejuvanexog.weebly.com/uploads/1/3/5/3/135311054/8240020.pdfIn PDF document text
    • https://cdn.sqhk.co/gofelaxes/michehj/halloween_decorations_indoor_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/X2c9Rgf/tan_leather_sofa_room_ideas.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B4 5716 bytes
SHA-256: aab5e3a8df815577361031aeef8c205acd0ba6bb3e1e1e59f25563649f93cfbc
font_01_sfnt_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off0000feba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 10472 bytes
SHA-256: 9e76f3eac888b8d06d8d04aa2b3aebc79f13ee954dc21e695038fa6cd0d4769d

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