Malicious PDF — malware analysis report

Static analysis result for SHA-256 3269098e1cacaeab…

MALICIOUS

PDF

73.5 KB Created: 2021-09-15 03:44:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cf25fd795a8441f18f178b4dbe2efb55 SHA-1: 311cabed393d6e747f2f979ea6b52ce6a2f156d1 SHA-256: 3269098e1cacaeabf97be537d8ef8e57bf5c103db2de214dba2886ab1bc5cc99
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://burattinojatek.hu/userfiles/file/39084041357.pdf In PDF document text
    • http://patriabrno.cz/userfiles/files/medutaxerisaxadatip.pdfIn PDF document text
    • http://www.gonouvellezelande.com/files/51953742614.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/felaguzemedo.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/56371459675.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613254df6fe91---59716537613.pdfIn PDF document text
    • http://vipforiraq.com/userfiles/files/kizapevi.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f01e14856c---lewisugenutidetoregin.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/0b27e732fd23f30a6834954da39add85/rixosevirafexuworopade.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/donawugan.pdfIn PDF document text
    • http://manisafar.com/basefile/marcosafarir/files/kurakitirexiperudelijis.pdfIn PDF document text
    • http://kelsenator.com/userimages/81553046863.pdfIn PDF document text
    • http://webs123.com/userfiles/file/gazuvurijikabixe.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/4996199815.pdfIn PDF document text
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/71497238687.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/23811056197.pdfIn PDF document text
    • https://cometgroupinternational.com/ckeditor/ckfinder/userfiles/files/pilepexufewopafelili.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138ff1be2e---91180479262.pdfIn PDF document text
    • http://spbmedaks.ru/sites/default/files/uploads/25321629031.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/popujomabuwepo.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141150894bb7---xirevutipifiwuloweloz.pdfIn PDF document text
    • http://cityfate.com/files/files/31432616593.pdfIn PDF document text
    • http://indexone.ru/upload/file/vazefozodovujadozuvitan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=instagram+full+profile+picture+viewerPDF 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_off0000bde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5FB 15828 bytes
SHA-256: 32663dafbb593d0f0eacfa0d104053d0d482e6cce7f8ac6d87d8ac68ba1c17ae
font_02_sfnt_off0000feaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 11028 bytes
SHA-256: c07242778a39487b70e17bd662ea4b70893414be2cd4d9a2f3401a10918f7900

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