Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b630a2f1bd37a83…

MALICIOUS

PDF

79.7 KB Created: 2021-09-03 09:14:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 040667f67cbe8208b54739aa53cbeafe SHA-1: 6aa2580cc88d6e75713239b6f889c399757f7035 SHA-256: 7b630a2f1bd37a83a86701145ce714b37435f5950b1d7d20baf6fa5dd21c2321
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The presence of embedded JavaScript, although not fully analyzed due to obfuscation, suggests an intent to execute malicious code or redirect users to further malicious content. The file's structure and numerous external links indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5210

Heuristics 6

  • 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.
  • 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
  • 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://philabc.ru/uplcv?utm_term=invisible+man+pdf+hg+wells PDF link annotation
    • http://stopguepes72.fr/userfiles/file/labazimuwutal.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87198dbd8---todepewubujuvirusijipuzes.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/rogolowaxepoza.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80e3dd8c33---78707205254.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/3f6567f07af91d7bc21cd3f64f1cba9d/60608257070.pdfIn PDF document text
    • http://teplospectr.ru/images/files/249927015.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c0cb33e3765---semuraxo.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c7b2e9775cba6d4ea4473fe4fda6a9b2/desivuzagex.pdfIn PDF document text
    • https://tahubunting1.com/contents/files/14807836623.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/nalevojojiwoki.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/lirogavij.pdfIn PDF document text
    • https://venusnvs.com/userfiles/file/pubewizonedot.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd6e8834481---susefabawukamojo.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/61907188946.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/33614274520.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/gebezofab.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/96627499800.pdfIn PDF document text
    • http://temple.mo/userfiles/file/38958340289.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/b6ae07627a2ee3a0ab924d9b41e782b1/25604660986.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/nadijotuxu.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0aa8c5035---60835700792.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/vuwezolepukadafutub.pdfIn PDF document text
    • https://marblo.marblobaths.ph/app/webroot/img/files/20382931632.pdfIn PDF document text
    • http://rallyteamwalraven.nl/file/namiwemamovaxagera.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/lemazuxukud.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e01df41a7---zusutewodibovozijubawib.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2124d3197---nomuwobitidulavosetobabof.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EE 17836 bytes
SHA-256: 60e85140f8155b06e728ea726f18f18585de329d4e169dbc4f53ef3ab8b164a7
font_01_sfnt_off000116f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1