Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de9e39e3fbe493f…

MALICIOUS

PDF

80.0 KB Created: 2021-08-02 00:12:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 50fdac9463746b067ccebeaded8e5872 SHA-1: 94335063eeb80e9cff0ca2d3fb59f57dc5f320f6 SHA-256: 7de9e39e3fbe493f70b223741e0f53cf9a8032b128e8bfc0f19c8b6b39131fec
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, suggesting an attempt to host or distribute malicious content. The document body is unreadable, but the presence of multiple external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9347

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 https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/69ed0759a317f507a78e8ecdb16d5956/pejubamivagitokawiw.pdf In PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160907a7710cb2---juximan.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e684a20cea---rodiviwuwupesivexepaxesun.pdfIn PDF document text
    • http://thecobbfr.com/clients/4/43/4363d5a08aa72aedcf7f7d4dd0675897/File/43099045450.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/013865717d6c7d7e4c9a78d081a23739/39904803245.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/pivudadevasubajakubiboj.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/65818669569.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-6-24/20210624110338213308.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a17a5abac---6707736393.pdfIn PDF document text
    • http://clingac.es/d/files/saxowagebogemafilot.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/eec764534c8dc3c11d53847953bae2a8/dafururijexaxiwomaj.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/3d758c1a118dc8e24bc417ce284bfe30/gowelukimukazokeruwexove.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1608fce3cbf1d6---68772412068.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a39386b0a---4587826627.pdfIn PDF document text
    • http://carrasvilla.es/uploads/files/zanisosuwemebakufamafof.pdfIn PDF document text
    • http://stylekd.ru/files/riduzulutoliwulijip.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c04cea96a88---13253770265.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/xedezebuwokigo.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/9ocnhs60vqvqhur92noa0o0gf9/rumipodirupadazidi.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/92986915189.pdfIn PDF document text
    • http://flexa.cz/docs/file/fopivupam.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/kolomubuwoxelizil.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2683959358df80a45346ef12d98b3814/todofutiwakomig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=best+how+to+read+tarot+cards+bookPDF 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_off000116ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EC 17580 bytes
SHA-256: e32845ba32264b3779c6ad63cbc9098daa89b3cf3cd4d04111c854e509cb6d57