Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98575eadc451b79…

MALICIOUS

PDF

76.6 KB Created: 2021-03-02 15:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 5172f5b2fade624261de9cb9309af746 SHA-1: 49ec1b5f000352125777a4bbed07c1fdf54f291e SHA-256: d98575eadc451b791ff7bbfc002ccc171bc4ae77775adb5bab6cdcf49dff505c
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded URLs point to various domains, some of which are associated with potentially malicious content.

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://xezojetit.ru/award?keyword=key+challenges+in+higher+education+sector PDF link annotation
    • http://sethel.xyz/resumen_del_libro_la_tregua_de_mario_benedetti_yahooe3dbv.pdfIn PDF document text
    • https://lalevajapogos.weebly.com/uploads/1/3/0/8/130874146/buminuvugam.pdfIn PDF document text
    • http://buzatukati.iblogger.org/graco_magnum_x5_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/pevelefotuve/JjoT8ih/fun_words_that_start_with_the_letter_f.pdfIn PDF document text
    • http://creditscorehelp.info/philips_norelco_hair_clipper_series_5000_reviewvvp8a.pdfIn PDF document text
    • https://xoravali.weebly.com/uploads/1/3/0/7/130775395/daweg-numomitivute.pdfIn PDF document text
    • https://cdn.sqhk.co/tunuviju/ZOfjbc1/eye_color_changer_app_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/j5hihjf/codashop_ml_usa.pdfIn PDF document text
    • http://boxberry-24.cc/golagivekirejal0yy5.pdfIn PDF document text
    • http://steelsho1.club/47867723418majk6.pdfIn PDF document text
    • http://fertpin.online/diplomatic_answer_antonymerkux.pdfIn PDF document text
    • http://talakam.space/nugowopenixup8hvg.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/Qjcifuu/30130799244.pdfIn PDF document text
    • https://tavovoxiwazufaj.weebly.com/uploads/1/3/5/3/135325502/6391352.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/Meyiajd/mad_city_rooftop_police_squad.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/iighzua/valkyrie_maker_codes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipomivizipe.epizy.com/diniwewolaximogefa.pdfIn PDF document text
    • http://samutusizezos.epizy.com/brattleboro_reformer_vt_obituaries.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_off0000f03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 5272 bytes
SHA-256: bf44c21c70a925df2d3d5495c9089d923c5c45214ee00fad71e87b216a4c61e0
font_01_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 10032 bytes
SHA-256: b25377db32a4b1da4f9eb737c36ce476f3c79ae5279c4efa743b32e11b35bc56

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