Malicious PDF — malware analysis report

Static analysis result for SHA-256 66e913b666344e0d…

MALICIOUS

PDF

82.9 KB Created: 2021-09-21 02:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 6f7777db2bc8679cfdf73b5473d31235 SHA-1: 78a4984a738f50714f731440fadb19d44b37ade5 SHA-256: 66e913b666344e0d2bdf19006b26372f539831d0a9c7f36f3f9c524d996f330d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The PDF structure and embedded content suggest it's designed to exploit PDF vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • 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 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://synerhu.ru/uplcv?utm_term=all+friend+finder+app+android PDF link annotation
    • https://dcimx.com/files/meliposeridefewufule.pdfIn PDF document text
    • http://bagiez.de/userfiles/file/79101691715.pdfIn PDF document text
    • http://laboratorioshamalab.com/userfiles/file/furinuki.pdfIn PDF document text
    • http://cpviettin.com/upload/files/36789421784.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/5474573691.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/pufelamozupi.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/67727342643.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3ca8e24c95275551f048ea3f7cfe0135/xugisotuxamigiju.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/73623334015.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/vazosoku.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/guzadu.pdfIn PDF document text
    • http://maytinhnangdong.com/files/uploads/editor/files/64076393267.pdfIn PDF document text
    • http://n3ss.ro/ckfinder/userfiles/files/fugofonuzuvuzuredarino.pdfIn PDF document text
    • http://brmxn.com/userfiles/file/20210901114531_swuw4l.pdfIn PDF document text
    • http://trunglamdecor.com/uploads/userfiles/file/78844849551.pdfIn PDF document text
    • http://gk-eventus.ru/admin/ckfinder/userfiles/files/67672078280.pdfIn PDF document text
    • http://homearcky.nl/userfiles/file/xoporefedoravemisojaj.pdfIn PDF document text
    • http://afslab.asia/upload/files/77246837020.pdfIn PDF document text
    • http://www.poliklinika-hb.cz/userfiles/file/8486194118.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/97317962794.pdfIn PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/34417631577.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/jefagexiti.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off0000e0ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CE 10204 bytes
SHA-256: d1a3d4cd21277ba1a28c7de7d87fa3a9feb6f99343bec5b4f175b59e877459ef
font_01_sfnt_off0000f7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AF 18096 bytes
SHA-256: f2a696a0efb6676c165168984622791a50ac3b2e68ea4a2530813332fa209ad5
font_02_sfnt_off00012694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12694 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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