Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb11efb4536bd29…

MALICIOUS

PDF

89.4 KB Created: 2021-03-01 20:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4fa1ae632ad855bc35215f604eb1f34c SHA-1: 0f43dcd4ae2f86aba09d78cc5988b96321095d9c SHA-256: efb11efb4536bd2909183c6f6a66b50aadcdce3dda9129da531d638d72f8fd8b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document contains numerous embedded links, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a link farm tactic, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=switch+games+2020+rpg PDF link annotation
    • https://nesujuge.weebly.com/uploads/1/3/1/4/131407687/9418032.pdfIn PDF document text
    • http://womenita.fun/21350556208rh66p.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/barrons_1100_gre.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_6023e6dc35432.pdfIn PDF document text
    • http://vasuxarogaxatix.iblogger.org/xilolulepaxogomuba.pdfIn PDF document text
    • http://boothattendant.com/bhoothnath_returns_full_movie_hd_1080p_downloadgqa70.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/medaliwiwo-sazaw.pdfIn PDF document text
    • http://copyright-notice-ig.com/australian_curriculum_english_scope_and_sequence8w8sa.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/difjagc/janamoloruk.pdfIn PDF document text
    • http://nexefugo.iblogger.org/arrancador_suave_allen_bradley_smc-3_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/jcrjidl/rogasajupujib.pdfIn PDF document text
    • http://nijaxubazaziw.mypressonline.com/gifufuwojojipipowilodikul.pdfIn PDF document text
    • http://airned.ru/how_to_winterize_an_rv_with_airsz57w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jomedive.epizy.com/68570268135.pdfIn PDF document text
    • http://bemabam.myartsonline.com/grammar_exercises_with_answers.pdfIn PDF document text
    • http://xetulugesoboko.epizy.com/canon_lide_700f_manual.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_off00011eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAA 5784 bytes
SHA-256: 159902a5af8d0fe88511d45d5cd1530e44435632cbab8ea0690ba73d8fc8a466
font_01_sfnt_off00013247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13247 11396 bytes
SHA-256: b3c10049a005d2fe57072b0acfe78bc25a3e3348893b3aeca2e3ca28cd659e92

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