Malicious PDF — malware analysis report

Static analysis result for SHA-256 424c920340e58822…

MALICIOUS

PDF

84.6 KB Created: 2021-08-11 17:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: a5b9b21a63d7603435ee3706c2780641 SHA-1: 8820428c36ce322b582f0337bd7d930ad8e8ce81 SHA-256: 424c920340e58822d1d7c2f8420fb59bd956ee064c72daa8bd3d4b9ef99b6ee6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites. These links appear to form a link farm, a common tactic for distributing phishing content or directing users to malicious sites. The ClamAV detection further supports the malicious nature of this file, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3734

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://smidgel.ru/uplcv?utm_term=how+to+pair+mpow+m5+pro+bluetooth+headset PDF link annotation
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16071c51c4af04---88244244156.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/v6amu634n8amd15mm7359cb6k0/63052073578.pdfIn PDF document text
    • https://ventadeterrenosurbanos.com/userfiles/file/90463026549.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/javiwafopigop.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077221c6af51---gebaga.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/jutolesawuvapewuzirisol.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/topolodadarav.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/29472754901.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985a720beed---sojojaviwunagoweja.pdfIn PDF document text
    • https://ambalatender.com/upload/files/4498879473.pdfIn PDF document text
    • https://nexusmediation.nl/files/40414932161.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c18412439---butijetuf.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/718778d6eebd576f8ade90dbdbbb8328/jerupelagowos.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087a7f62c806---wixonez.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874e0aaf0c---javekiwoledupagexivolo.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/bototugobap.pdfIn PDF document text
    • https://eberli-medical-supply.ch/upload/file/64871214695.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/4bd1615058f6b2105b3a43e22c6dd545/9585592516.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a24fa49b3---64128553459.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/89396514839.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb154f2d1d---1316282197.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/ec185eaf30bc4b81210783a55e5e7d60/tulemisanareb.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210629071457_ol7900.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ec974aa08a0f4655a7580f009cd80c90/27263611041.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/78681445950.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/mazusawunum.pdfIn PDF document text
    • http://ruben.pl/ckfinder/userfiles/files/35034603448.pdfIn 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_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 11004 bytes
SHA-256: ba60d1aa6eabaa1fd3b0d7a1e04ede7ecb3e17dbec8654021474fa9c57abaffc
font_01_sfnt_off00010bb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB7 17684 bytes
SHA-256: 93dd6c0b3f1074a3336d424cd23cc01fb5674bec18777c0f04f8ca89cac51d24
font_02_sfnt_off000139ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.