Malicious PDF — malware analysis report

Static analysis result for SHA-256 941c621bd3dad7db…

MALICIOUS

PDF

82.7 KB Created: 2022-05-04 23:38:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 61012bbdaf3ec94f20dc710456f3a455 SHA-1: 408268c40905ad61623caaa49be9bff97ec9c5e8 SHA-256: 941c621bd3dad7db7016872ff11fee855c8a745a65c41ba30057ffd75c371966
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. The embedded JavaScript is likely used to facilitate the redirection or exploit PDF vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wirut.co.za/YmrXLWy8?keyword=roblox%20theme%20park%20tycoon%202%20achievement%20guide%202020%20printable%20list%202017 PDF link annotation
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16230527f7293d---wikamowasufejokogif.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/kaxixalitaxakonijeduvolaw.pdfIn PDF document text
    • https://dorizudoxifon.weebly.com/uploads/1/3/4/3/134330452/7816551.pdfIn PDF document text
    • https://jazuwexakabe.weebly.com/uploads/1/3/2/3/132302764/dixoganabezowup-ninozokejurogib-pinavaxefu-sagolisakored.pdfIn PDF document text
    • http://www.imcet.org.tr/kcfinder/upload/files/fabakexep.pdfIn PDF document text
    • https://kerixagagunusuz.weebly.com/uploads/1/3/0/7/130776265/tivedu.pdfIn PDF document text
    • http://valleytechltd.com/assets/ckeditor/kcfinder/upload/files/58626171377.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/gaxonizinufaditaxur.pdfIn PDF document text
    • https://kubojetezeb.weebly.com/uploads/1/3/4/5/134586336/67509422.pdfIn PDF document text
    • https://danupinizagene.weebly.com/uploads/1/3/1/4/131483344/8126141.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/kosatomofelenorafuvonijun.pdfIn PDF document text
    • http://cainghienbinhduong.com/uploads/userfiles/file/59534062132.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/jinikiwovuladusafoj.pdfIn PDF document text
    • https://rhuyscampingcar.fr/images/files/jatokegugofujozitevu.pdfIn PDF document text
    • https://dilarutobafe.weebly.com/uploads/1/3/4/4/134456037/nutexe.pdfIn PDF document text
    • https://tidymoney.com/ckfinder/userfiles/files/87616884061.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1624907c019993---lozegitagerepuro.pdfIn PDF document text
    • https://nogovomavidel.weebly.com/uploads/1/3/1/6/131637041/luranujokonefa.pdfIn PDF document text
    • http://goupcrm.com.br/kcfinder/upload/files/guruzujajexomamogital.pdfIn PDF document text
    • https://nhomphuongnam.com/upload/files/lomigetebajulokukekebezo.pdfIn PDF document text
    • http://ps-chiptuning.hu/userfiles/files/rareparexose.pdfIn PDF document text
    • https://wosutazewaxutu.weebly.com/uploads/1/3/0/7/130775331/bekuzelufimi_jetevijadu_nidikit_xofefixagez.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/57836411666.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/buzurimo.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/70822808338.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/zutez.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/widofomin.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F3 17960 bytes
SHA-256: ce4a0e1804632a809d96f13d2888ebd26fbd9d8c14734448ccae6c2339c6db5c
font_01_sfnt_off0001078a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA1 11964 bytes
SHA-256: 417294c82c9113d7b35e10484bbd5a968db70dd496d3db1296570b960218753e