Malicious PDF — malware analysis report

Static analysis result for SHA-256 23cd46c8287f1070…

MALICIOUS

PDF

66.5 KB Created: 2021-02-25 22:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7e19fc1f56556f73b11da27556c7a90f SHA-1: c8cfc787c19cfa5b6559ea6a10d2334e5c441868 SHA-256: 23cd46c8287f107086420b0c0504848847a0743a78390abbc92c7ba3dfbf1c2a
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting or unknown reputation sites, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that this document is part of a link farm designed to redirect users to malicious content.

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://druttle.ru/wix?keyword=montgomery+ward+tiller+manual PDF link annotation
    • https://cdn.sqhk.co/besogevipadi/gegiagc/revovunubabekivosovu.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/gdighaE/origami_paper_airplane_glider.pdfIn PDF document text
    • http://chambrely.xyz/cricket_news_videoycha3.pdfIn PDF document text
    • https://cdn.sqhk.co/foxoxaze/aG19Jjj/36361447835.pdfIn PDF document text
    • http://tunezazetadu.22web.org/wewajuworudur.pdfIn PDF document text
    • https://cdn.sqhk.co/togokitaz/hcghvpI/into_the_dead_2_zombie_survival_game_download.pdfIn PDF document text
    • http://jaraxusej.iblogger.org/nivowidofurotisone.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/op_auto_clicker_pc.pdfIn PDF document text
    • http://xenivut.epizy.com/99174386564.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/rakafulak.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/zizofuraligenudez.pdfIn PDF document text
    • http://vopapatadape.epizy.com/xifipubuvupixivapusutojur.pdfIn PDF document text
    • http://votoromuw.epizy.com/borderlands_2_game_guide.pdfIn PDF document text
    • http://dovagoxaluzof.rf.gd/81167905591.pdfIn PDF document text
    • http://roxeruteruda.epizy.com/zigevilorak.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_off0000c545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC545 5168 bytes
SHA-256: 83813341b4d9a5081930eeef41f94ded37f1305150bd04c2b0870a63938437b7
font_01_sfnt_off0000d6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E1 11436 bytes
SHA-256: 916d521646feab905712e3d006eb38908dc921b8c35fe84ef2499e9379f559e7

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