Malicious PDF — malware analysis report

Static analysis result for SHA-256 291dfc929f48eb6c…

MALICIOUS

PDF

56.5 KB Created: 2021-09-29 12:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 02bf5312b2d595efaa38e920cc1e1dc3 SHA-1: 3fe3917299d801f27858e02a46d7a9f06b3e0369 SHA-256: 291dfc929f48eb6cf39179b6eea2b718a77f11b442552b0a84e8767861176a1b
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains an image-only design with a clickable action, typical for directing users to external sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit user interaction, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8248

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 56 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://sledovani3.gpshlidac.cz/www/userfiles/files/66782654689.pdf In PDF document text
    • http://fourfoods.com/images/files/venexopiv.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/luzamapakelun.pdfIn PDF document text
    • http://mibenjamin.com/userfiles/file/80806269791.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/74765598170.pdfIn PDF document text
    • http://zima.italie-ubytovani.cz/data/file/tukajonudopepifimimab.pdfIn PDF document text
    • http://tk-weld.com/images/library/File/85973884177.pdfIn PDF document text
    • http://obedovice.cz/userfiles/file/75023505278.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/67792975427.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/fafebojatejowexodumowawep.pdfIn PDF document text
    • http://thietbianninh188.com/uploads/files/lenaveduwumesuna.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/xodabomejivenemi.pdfIn PDF document text
    • https://signika.pl/Upload/file/21277616519.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/rokuwikeforokulukonapinex.pdfIn PDF document text
    • http://ivankotov.ru/img/lib/file/bewumepa.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161317dfbe8745---mewiwo.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210919194446.pdfIn PDF document text
    • http://xn--80aafjbawrcdgsodbdciig4a5v.xn--p1ai/pict/file/watebifikom.pdfIn PDF document text
    • http://prabashproperties.com/ckfinder/userfiles/files/vikabas.pdfIn PDF document text
    • http://pphjako.pl/userfiles/file/wuwakibekolutapefapome.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/rifumonopezu.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/kixobikopamased.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/sssnbatg5es61ctosu3orfv5jv/kuximuduvaleneva.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=passandroid+passbook+viewerPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB157 14292 bytes
SHA-256: 9ced30608f825d8e01245ef6b33eff21a25cfaa87bf37a080786a2ea518c5ffb

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