Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7617d7c1125f9b2…

MALICIOUS

PDF

70.2 KB Created: 2021-02-17 07:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b57ac6dd0de14707ff1683fc9ca1a24d SHA-1: 66224c898c719789e5b2c76a031e2c62361f82d7 SHA-256: a7617d7c1125f9b22cd88eaeffc0d0b73cdd83fef19fe5c4b7c958e5fef2be8b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The primary URL, 'https://bologen.ru/wix?keyword=interphone+f5mc+manual+espa%25C3%25B1ol', appears to be a lure, presenting itself as a manual search result to entice users to click through to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://bologen.ru/wix?keyword=interphone+f5mc+manual+espa%25C3%25B1ol PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446782/normal_600cb467217c4.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/8a2f329530a.pdfIn PDF document text
    • http://kepamusujuboza.iblogger.org/area_and_perimeter_of_different_shapes_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/ifHVjgF/sisidugagupukaxutuzuli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490920/normal_5fce77bc6b7ff.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/hdbbjgf/bullet_time_bounce_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456143/normal_5fe5aec553b9a.pdfIn PDF document text
    • https://cdn.sqhk.co/minederepa/giWlhc6/nonasojapa.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/1082662.pdfIn PDF document text
    • http://triple-doska4.club/35593593535adtre.pdfIn PDF document text
    • http://cadenalia.com/sound_meter_apk_mirrorhxg5u.pdfIn PDF document text
    • https://tevidozeji.weebly.com/uploads/1/3/4/8/134887032/rozuzonaje.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/7c85b09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476941/normal_5fd1edbef1057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_5fe95dd0408bc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bupozefi.epizy.com/xupaperom.pdfIn PDF document text
    • http://zugugizifozuwor.epizy.com/feluvomakalik.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_off0000d4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F8 5528 bytes
SHA-256: 3b5b93e196c8517f04d08ee89d4ad8035223d61c834544d05314a8df76595ccf
font_01_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 10184 bytes
SHA-256: 6ceb91ac25034a10daf413efa662426f30cf3d8296926812dfd3cf47422aa905

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