Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb662909572b42e6…

MALICIOUS

PDF

89.1 KB Created: 2021-04-04 15:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4ae8f2eef82e5e95d7d745eccfd5d2b0 SHA-1: 25f90041dc97224e8597a4e865413ee80eb26b77 SHA-256: cb662909572b42e680bf1b0e259a29b18303add248c6fc4d19ec38ed894df889
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs pointing to various domains, suggesting a link farm or phishing lure. The document body is heavily obfuscated, but the presence of numerous external URIs and the overall heuristic firings strongly indicate a malicious intent to redirect users to potentially harmful sites.

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://nipisod.ru/wix?keyword=osrs+barb+assault+collector+guide PDF link annotation
    • https://cdn.sqhk.co/pozigafo/a4EogcB/home_depot_3_gang_switch_box.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/meaning_of_bounded_rationality.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/jack_reacher_full_movie_streaming_free.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/manual_of_love_2_full_movie_watch_online_free.pdfIn PDF document text
    • http://nafepuzemobir.sportsontheweb.net/806125583.pdfIn PDF document text
    • https://gabelutabidos.weebly.com/uploads/1/3/4/6/134678244/fupurukebemi_dotewawalake.pdfIn PDF document text
    • https://cdn.sqhk.co/mezewimaxus/ux4igic/tomb_runner_2_poki.pdfIn PDF document text
    • https://dapalijika.weebly.com/uploads/1/3/0/7/130738969/9649082.pdfIn PDF document text
    • http://napowojeba.medianewsonline.com/84875288420.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/vector_algebra_class_12_formulas.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/probability_distribution_exercises_and_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvakumo/gixUPhd/bloons_td_battles.pdfIn PDF document text
    • http://xuxetosufuzo.getenjoyment.net/msoe_nursing_acceptance_rate.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/greenhouse_effect_worksheet_middle_school.pdfIn PDF document text
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/c22dba.pdfIn PDF document text
    • http://tavafotuzefox.sportsontheweb.net/research_techniques_in_accounting_and_finance.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safedoguno.onlinewebshop.net/72556570583.pdfIn PDF document text
    • http://pozajuw.atwebpages.com/rapport_d_analyse_financire_d_une_entreprise.pdfIn PDF document text
    • http://tatesit.myartsonline.com/call_centre_agent_job_description.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/64162701033.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_off00011f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F24 5276 bytes
SHA-256: 0c4e0eb6756f140beed20ba1573b1e044376d1775186cfb59cfeaf2db7f2f7b7
font_01_sfnt_off00013114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13114 11300 bytes
SHA-256: 24a9c693e0f23dda9988d1d853e5c38df1256e7af1c10b8dd07397746dfc1d77

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