Malicious PDF — malware analysis report

Static analysis result for SHA-256 9410f1aa65537eae…

MALICIOUS

PDF

79.4 KB Created: 2021-10-09 21:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: f17d263e78e866b94014c76b35774807 SHA-1: d176b454580144dad8aae25039c21968af5b7829 SHA-256: 9410f1aa65537eae19e3f49d7181e03c3ac32ea73b1cb17143e7e20ffcd8d8a4
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests the document is designed to host many links on disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://mikc.kauzi.org/uploads/File/83812798714.pdf In PDF document text
    • https://bakotech.at/uploads/ckeditor/files/kanumadotozelixokuti.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/jomukubomi.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/4233068594.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/69053049239.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/likurozokepi.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/getugik.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/runimoka.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138e52c278a4---79924034597.pdfIn PDF document text
    • https://subarini.ro/mm/file/52149647632.pdfIn PDF document text
    • https://panificioilcavaliere.it/userfiles/files/67229889833.pdfIn PDF document text
    • http://edmo-cars.nl/images/file/28025112318.pdfIn PDF document text
    • http://autolavaggiocraparotta.it/userfiles/files/narukibe.pdfIn PDF document text
    • http://joyerialaplaza.com/ckfinder/userfiles/files/56323118839.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/9587064323.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/zonumobefidegodameb.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/85492313450.pdfIn PDF document text
    • http://cgpreceptor.com/ckfinder/userfiles/files/94938214022.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/12970670482.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615b4d0df05a2---80411723415.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021091920384973499.pdfIn PDF document text
    • http://specialcats.nl/media/files/213441486.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/65897884940.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/jejigokosufozudemef.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=194bhs+for+salePDF link annotation
    • 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_off0000cda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA0 18720 bytes
SHA-256: 2cfd532d0b98108dec50e9b0d575cba3294ad60c23dd9b05164145bd2c908453
font_01_sfnt_off0000ff2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2D 10360 bytes
SHA-256: 5bb0126a42a6424f5c611883abed392eb8f6dd713527d0f765daf630d742ff63
font_02_sfnt_off000116cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1