Malicious PDF — malware analysis report

Static analysis result for SHA-256 23905251e0d9f637…

MALICIOUS

PDF

70.9 KB Created: 2021-03-20 17:03:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 9c398572e9e379cce530a5bee7625229 SHA-1: 102305e8ad39547783dac4c4f52ca325e92f7d5a SHA-256: 23905251e0d9f637443991b1161ba93dd5f38fd661e05e392ac5f0dd26cd6a76
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/award?keyword=alter+ego+5+c1+pdf PDF link annotation
    • https://rizidapovo.weebly.com/uploads/1/3/4/3/134316848/9216206.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/hiiaShg/ccli_reporting_help.pdfIn PDF document text
    • https://ralirepiputup.weebly.com/uploads/1/3/4/8/134852471/6423480.pdfIn PDF document text
    • http://weinmvc.net/zosovorumefakexedogaf9zn3.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/667769b66e490.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5fcd3fe616382.pdfIn PDF document text
    • http://itawegan.fun/74600406317snb0y.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452846/normal_5fc967332d931.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491414/normal_5ff7da41d201c.pdfIn PDF document text
    • https://cdn.sqhk.co/kenipafitu/6I1nicx/28713585956.pdfIn PDF document text
    • https://cdn.sqhk.co/bafebolabefo/hfvXOgj/personal_computer_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcf74ba2bee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6049175c86ade.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/je8vhgU/community_ecology_definition_biology.pdfIn PDF document text
    • https://cdn.sqhk.co/bajowekununa/hahjifb/car_racing_game_unlimited_coin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizowasogafiw.rf.gd/larufujujejawakul.pdfIn PDF document text
    • http://tumurubulofomam.rf.gd/42520538246.pdfIn PDF document text
    • https://1cf095b7-1d29-4152-b82c-7733cf7ba0c7.filesusr.com/ugd/c1de29_7d7de55b805c4dcda0a1c9dc239c4122.pdf?index=trueIn PDF document text
    • http://tolelagegovoz.epizy.com/zemunuvonivatiludov.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_7dd82ac0161e44508d2a70d740dcfca4.pdf?index=trueIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_b1ce11bbb3a1460788ff67735ccdc373.pdf?index=trueIn PDF document text
    • http://poluwusafoge.epizy.com/brom_error_s_brom__da_fail_0x7d4_moto_c.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_off0000d5eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5EB 5100 bytes
SHA-256: 662c438845e578819e72caf33fee104189268b61e16318cace645da80d00a946
font_01_sfnt_off0000e76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76B 12156 bytes
SHA-256: e9b15a1a1657f8d0906e98bbd9f445997b28b905cdba92b8d800cf6805c7f3b2