Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c102497cac8f4f…

MALICIOUS

PDF

76.5 KB Created: 2021-03-20 23:03:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 46e2eb9a81a0185aee8a97e67f82ca0d SHA-1: 2b1552e8db37c6c891c155f7919306f91ce78d7a SHA-256: 93c102497cac8f4f9998a303e2a6002c3bd66304706cdb7b94f1e5ed70696f8d
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by a ClamAV signature and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to potentially malicious sites. The embedded content, though heavily obfuscated, likely facilitates these redirects.

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://golowaki.ru/aws?utm_term=construction+lingo+for+dummies PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402721/normal_603312daea160.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_5fdbbe82c9c66.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/5nAmkha/phantom_bomber_b17.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/vcwgg8H/disneyland_resort_express_route_map.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/what_are_the_highest_paying_jobs_in_information_technology.pdfIn PDF document text
    • https://mafivuvaga.weebly.com/uploads/1/3/5/3/135323118/6afe626.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/past_continuous_exercises_questions_and_answers.pdfIn PDF document text
    • http://xafomona.mypressonline.com/genetics_multiple_choice_questions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1d531bb4c.pdfIn PDF document text
    • https://xawizavikerid.weebly.com/uploads/1/3/4/5/134525990/e7e9fd01e3efb20.pdfIn PDF document text
    • https://cdn.sqhk.co/pevedapev/cji6ngc/hong_kong_minersville_phone_number.pdfIn PDF document text
    • http://mazanatur.space/kusadejazhtnku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_6019b6e9f3cb0.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/basic_algebraic_geometry_2_shafarevich.pdfIn PDF document text
    • http://reform-st.ru/47933592900413io.pdfIn PDF document text
    • https://cdn.sqhk.co/teketerep/9apbx13/84116494916.pdfIn PDF document text
    • https://tewafegode.weebly.com/uploads/1/3/5/3/135350941/guwif.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 5036 bytes
SHA-256: a7f3f277c383e632b27bd842331720c9383e8083de3b82b370547b7505356c65
font_01_sfnt_off000100cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CC 10516 bytes
SHA-256: a44f6d709816640435789b58ad460874052bf400dd8372c7cb4e04c6fb709e5d

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