Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9d539895b8c8dc3…

MALICIOUS

PDF

70.9 KB Created: 2021-02-20 20:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 16ac564b9dbed2cf55895d122753fedf SHA-1: 626165d8dd5c580bd33a7267fd8c426945728226 SHA-256: c9d539895b8c8dc3c8407040f5ed9a431286f4cfcea17101679fcbd31248239c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. The document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, likely to obscure malicious intent or distribute malware. The presence of external URIs and the link farm heuristic suggest the primary goal is to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/strik?utm_term=kenmore+electric+stove+stainless+steel PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417643/normal_600f7332bfa4a.pdfIn PDF document text
    • http://connexion-amelii.xyz/how_to_adjust_daylight_savings_time_on_g_shockasxqq.pdfIn PDF document text
    • http://homearfes.com/enrique_iglesias_bailando7b6vk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496378/normal_6012e93842fda.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/hjdDDCE/interstellar_black_hole_gif.pdfIn PDF document text
    • http://bhd-management.space/4331195324bfjuo.pdfIn PDF document text
    • http://kozlo.space/xugesindkhzj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380527/normal_60311f0733568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379355/normal_5ffb50bd3712f.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/bjbNIhj/2783494658.pdfIn PDF document text
    • http://bcipreactivaperu.com/wewizefoxodb4ji2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vuzonulegi.rf.gd/babul_shooter_game_free_apk.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAB 4760 bytes
SHA-256: a03f6b4c18b51ba356a5caa09df8447da184f062dff339fcf4dd76d231bf760c
font_01_sfnt_off0000dbb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB7 10776 bytes
SHA-256: 8e10620da2d4e9bc9a6bcaceb7e306fca606c11b7d6ccca0722539cfd2452a0a
font_02_sfnt_off00010073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10073 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

Open this report in the interactive analyzer, or submit your own file for analysis.