Malicious PDF — malware analysis report

Static analysis result for SHA-256 df93308f248fe370…

MALICIOUS

PDF

94.3 KB Created: 2021-07-06 09:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a6ec31949c8212e9fa2dfbe4d03a8382 SHA-1: eb4304b09b04be4f4f4ba4f3cbdf676e99a2d8a8 SHA-256: df93308f248fe3703c327ad73f21a9989ba1b9776ce462ee81d16a85888b8a82
124 Risk Score

Malware Insights

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

The ClamAV heuristic identifies this PDF as a phishing trojan. Static analysis reveals the document functions as a link farm, with numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.1996

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://worldnaturalfood.com/image/upload/File/rawinej.pdf In PDF document text
    • https://biovuspharma.net/userfiles/files/60730713085.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/014459ddc7065eb6d4542993e34153ee/90251220773.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a72b4db52---44354565055.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/17896111724.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/lakol.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/4300432786.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ba33f9a9802---xavikobazixazuwopeget.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c6eccd47145---50466269468.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a1333ac3fa0---39400052326.pdfIn PDF document text
    • http://funkyspa.net/ckfinder/userfiles/files/51385614317.pdfIn PDF document text
    • http://rjt1.org/upload/files/83135591150.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f71174ebcd---gonuboweselu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f41504a41b617323cb042c872e086cf0/diwedasoroxap.pdfIn PDF document text
    • https://bbgpiti.com/userfiles/files/reradafovage.pdfIn PDF document text
    • http://medica-eg.com/userfiles/file/90287006866.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/c0af401d57c9c09e8011c46c18d4fdc9/waladuzalowosajunu.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/4b2aa21ef6c472b31baa2c7301b8f042/97428223440.pdfIn PDF document text
    • http://texmet.pl/userimages/file/60503411881.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d34c85c9ec5---dixagevowisofibasavis.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16098843043d72---wakoxigefajusafid.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/55ae0d3b916b5a0bd33052cb9c20db13/34744635322.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/3371228340.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=define+the+neolithic+agePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10501 17704 bytes
SHA-256: 4510f4ed697f28c491976ddbd43941ecccfd6ef09e850068855e86bbd5134479
font_02_sfnt_off00011ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFA 10348 bytes
SHA-256: 15e87c9bc550a83ff40c20e2d6ed599344af4de0fedfa3f29e1728923369ed4c
font_03_sfnt_off0001373e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1373E 6248 bytes
SHA-256: 4303cf5cc69391ae2f4691c95bf92870e73796ee768f33342c628019d3684932
font_04_sfnt_off00014c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C36 21284 bytes
SHA-256: 666742146879ae2ec8dc69cc654a90a7b4020c2851962b9749b41b8496e22452