Malicious PDF — malware analysis report

Static analysis result for SHA-256 b665975f1098ab1c…

MALICIOUS

PDF

110.8 KB Created: 2021-05-21 03:54:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8f24a231f748b18e75a2c0417c43c1cc SHA-1: 1798ee9ed1531acc2e67d270b3f779ff88ff59ac SHA-256: b665975f1098ab1c1680c3017a716f3e667cfeee43934dbc76324d4d2ab3089d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous external URLs, including a suspicious one hosted on 'lozipotod.ru'. The PDF structure suggests it's designed to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics. No scripts were extracted, but the presence of external links is a strong indicator of malicious intent.

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://lozipotod.ru/strik?utm_term=dirty+boyz+art+of+storytelling PDF link annotation
    • https://fuzifilagowiw.weebly.com/uploads/1/3/4/6/134698760/dc25b.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/engineering_graphics_important_questions_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374203/normal_5ff1b72f2ff86.pdfIn PDF document text
    • https://zekufizow.weebly.com/uploads/1/3/0/7/130775694/1558966.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379482/normal_600d8e21ae23b.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/how_do_i_reprogram_my_autostart_remote_starter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375515/normal_601a47a387add.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/17379896950.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/nirilurigivozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fe754e46ecbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_6042fd43e7fa6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416798/normal_5fca03b7688a9.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/batiwefuwemu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a308b8a5-49a8-461a-9e5a-c3008a6570fb/96064517248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f179ac-cc0b-41c2-b163-7f26eb42ccaa/porsche_cayman_maintenance_costs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df1ccd1f-9c2a-4549-a268-9ddd827fe220/firiperod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cae8350-32b3-4b2a-aa8c-fc99a82f7eb1/autocad_free_trial_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c0a08c-1ae5-4329-9bee-547a432c089a/read_sherlock_holmes_online_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06d5087-0b89-4bcd-9c90-747d73269f70/disezavana.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_off000172dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172DC 5224 bytes
SHA-256: 22505be895839ce3b975f175b7f4b6164fddd59b061d7f7cc74eda394225bcfe
font_01_sfnt_off000184d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184D0 11696 bytes
SHA-256: 158cf8c82cc64af89bc529e3831bf43b09c9867195c191ff04011f6368d676b3