Malicious PDF — malware analysis report

Static analysis result for SHA-256 259db74ac31f723b…

MALICIOUS

PDF

64.0 KB Created: 2021-09-04 15:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35560e1a536b2c3eee6aabb17dda89d5 SHA-1: d8de1947a75ce527ed580ff92d42c7e0b5535025 SHA-256: 259db74ac31f723b2191a39c5ceb64849c478b8a478023637f5ac873d5ded3be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6902

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://gocchame.vn/app/webroot/img/uploads/files/48005331356.pdf
    • http://cjcounsel.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3223456640.pdf
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/9253375584.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609db2c6d71aa---37906026437.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/q9dhgmmiktf4847fgvuo9mcae7/sibukixodewitusem.pdf
    • http://amexeuro.com/an3_Uploads/file/rexopotu.pdf
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/5283946132.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ae682f010829dda3b9f4e52c0e048c6d/53839668363.pdf
    • https://binarbaid.com/public_html/userfiles/file/damenutojim.pdf
    • http://iburgisidimarsala.eu/userfiles/files/rifaburiduzimavom.pdf
    • http://kirakuramenandsushi.com/uploads/files/86785210498.pdf
    • http://thermogroup.ru/uploads/files/zeloriruka.pdf
    • http://wasserburg.pl/userfiles/file/gasimedolexejiw.pdf
    • http://robertoantoniz.com/resources/original/file/12221372170.pdf
    • https://mbamantra.com/ci/userfiles/files/zunatejokamezotok.pdf
    • http://radtel-sport.pl/userfiles/file/10177574420.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/0g7iadv93oe194ib340q8uu7fb/23613048050.pdf
    • http://maslatalaia.com/userfiles/file/gedaxibuvagi.pdf
    • http://ahkjt.com/upfile/file/29459476436.pdf
    • https://heyratacademy.ir/file/78263616511.pdf
    • https://777mto.com/contents/files/11828251793.pdf
    • http://tw-echen.com/uploads/files/202108241854394795.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2166ef13f---wapelebimifewejakivip.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=lion+king+circle+of+life+sheet+music+pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce65.bin
c8ecfb2dfb357d09fcf9eaf71dedc9e91b7a154b33f54a290381c7b626596320
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE65 17184 bytes