Malicious PDF — malware analysis report

Static analysis result for SHA-256 3362bf70b596d425…

MALICIOUS

PDF

70.2 KB Created: 2021-06-27 07:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a1c0bb0a4b367e7dce5224df44d5b816 SHA-1: 06482655250da06cf910c3cb0e3f3c880dba9d09 SHA-256: 3362bf70b596d42567c37e3744d5a10cb8181c62d5d2af823f2375f04c629c5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as a distribution mechanism for phishing or malware, leveraging the compromised CMS uploads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6715

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5e74c1441---fudevabanirututopo.pdf In PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a796b4a5b19---24700170015.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092a4fa82b83---67579785170.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/766124c7697e63c23d36b2ff1b853457/17617524111.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210611112729.pdfIn PDF document text
    • http://wildpflanzen-planung.de/file/sorujalixuliwuxaxizaki.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083d69a2b866---xutubo.pdfIn PDF document text
    • http://toyotarentcar.net/FileData/ckfinder/files/20210620_1B86CE78C9C6839A.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/593949553.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/25c4b736a78a7bcaa6d4d39e9b1d31fb/kevawatatewuto.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/30642565914.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/figopubagis.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/fd397342b4f38ca1aaf4071ed1ef86f5/jukij.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160833291ec1b6---74155208710.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/55023100019.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/0lb714cuvjs8k9l5719frs47gc/86345587532.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/g2upuki4j1vavqjth0a9uokges/47729711960.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4ba8a7d92625e5eeadefbc019a4e4091/goxijomudobukekolev.pdfIn PDF document text
    • http://hoangduy.vn/vn/files/gujevik.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091df2180431---18559510291.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/64210332462.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b8b52eb31c636f6f7e0a8bf28e966059/duxedazeraj.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///35652400622.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/tfout6lcb6fobhkedobju63se3/25856406077.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=subway+surfers+game+play+online+free+downloadPDF 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_off0000dc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2B 16716 bytes
SHA-256: cb426ba59086e274d5195b9a888f9295717f518b5ed9a7efed57d785ee1bd43c