Malicious PDF — malware analysis report

Static analysis result for SHA-256 433a05e598c108f0…

MALICIOUS

PDF

68.1 KB Created: 2021-02-26 04:36:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: c32ea0f397ee8bcd033a0a0f352f8a87 SHA-1: e1566f61ffc1068183ee3d210dd4d6e1c8714ae2 SHA-256: 433a05e598c108f01a72848ea43a217b2a4643fa6695f25b55e8a074c82d6b73
124 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains references to URLs that are part of a link farm hosted on disposable domains, a common tactic for phishing or malware distribution. The presence of embedded URLs and the link farm heuristic strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://bologen.ru/award?keyword=are+r+and+l+allophones+of+the+same+phoneme+in+korean PDF link annotation
    • http://citruss.space/58210688761c1zeq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426556/normal_5ff27b397dde8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489983/normal_600eec26d2da7.pdfIn PDF document text
    • http://it50discount.pro/827225319737yuox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fd6236e59a81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464327/normal_5feebb1092795.pdfIn PDF document text
    • http://odemebayisitrafik.com/labilokiwumefimibhaxb.pdfIn PDF document text
    • http://openplafond.xyz/jixerusaxoravuvipajan6h97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490116/normal_601e168e586aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379969/normal_600074c3bffa4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368952/normal_6007c9704cd32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481509/normal_6003981abefd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426063/normal_5fe1a75c350b4.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/tejonunaforesokezopefivo.pdfIn PDF document text
    • http://nikecortez.net/what_is_greek_religion_beliefsui3tf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_601e748fe9d1f.pdfIn PDF document text
    • https://s3.amazonaws.com/gonafoziguwewe/anti_virus_malware_terbaik.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/carrom_game_for_java_mobile.pdfIn PDF document text
    • http://sazexuxezife.rf.gd/87679931764.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/agenda_2020_para_imprimir.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/50781497242.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 6104 bytes
SHA-256: a25c73e25ffb254c0707440bd2a955639a84b170784317d9ce5be3af49084882