Malicious PDF — malware analysis report

Static analysis result for SHA-256 afeaa9ce911ef5c2…

MALICIOUS

PDF

67.0 KB Created: 2021-07-09 16:22:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 2f2b9e5b10e525ac45af33b02452ba4d SHA-1: 143944f90678f68a9cce2155a04071ab50d278e0 SHA-256: afeaa9ce911ef5c27d20818363744e7c647b8ae5d610cc320effb7cc314c6327
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 66 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://aquatherm-graz.at/files/57101240309.pdf In PDF document text
    • http://msinziniering.com/userfiles/file/27380580066.pdfIn PDF document text
    • http://limeitec.com/upfiles/editor/files/89196523804.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c708b9b6005---jatelasozuzavag.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fruolqnh18pd0luemlc347mcij/49997998119.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c04b1ac7c0e---pujiwananotefokagaki.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f79b44457---31975669141.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/juvefalamo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070aff5e144c---lexodujonitekora.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/cde8fa3e27a2738fba6179e5ab582aab/fugafiwojove.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/kotojekexup.pdfIn PDF document text
    • http://xn--o79av69abka850ab6c.com/upload/file/202106201709443990.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ac022a661ae---nebixujumonetovep.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/76543197901.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/f2scd0iftkjgcarcttimq2lba5/xaletiwa.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/69357863817.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/d2e5b44797e30458df54ada8ea540ee2/35024702751.pdfIn PDF document text
    • http://cukiernia.eu/upload/files/xajilexopafufixad.pdfIn PDF document text
    • http://carszana.com/image/upload/File/jisesufubikowu.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2072acdda20db7c3407bf55cc53575b4/gewerewez.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/40875865407.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=future+beast+mode+2+downloadPDF 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_off0000ad79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD79 10740 bytes
SHA-256: f946d3a483c9abbcd194f1df527f74e0c01467b56c2101475e3e6a899140ea2f
font_01_sfnt_off0000c646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC646 13692 bytes
SHA-256: f424f03d10a92a73c93b7432646104a887bd079bcf8141326695bcf8f8ef5267
font_02_sfnt_off0000e74a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1