Malicious PDF — malware analysis report

Static analysis result for SHA-256 09c3e6b96e9025a3…

MALICIOUS

PDF

113.3 KB Created: 2021-09-05 10:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 49c502b689d392be13429f9a6666a2f1 SHA-1: f498aae20b0f2e5ec7e2a7215605097d1ecc6d41 SHA-256: 09c3e6b96e9025a3fa7c483aa6125a78dc9a78fee16eb15127f30b2d060c91c9
124 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to websites hosted on compromised WordPress installations, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3654

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 https://chcial.ru/uplcv?utm_term=18+days+grant+morrison+pdf+download PDF link annotation
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d142ca4b1---kimebivapivizute.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/c675f4316c8d02fa955ee90026507cbe/86920173271.pdfIn PDF document text
    • http://kaowei.tw/image/files/20210527_174345.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c410a8b0b---69387983085.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d2d856bf5---98793886516.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/36200163206.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202107280933057280.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ab93ee18---68778409656.pdfIn PDF document text
    • http://studioscoponi.eu/userfiles/files/24889989762.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083ac64698b3---67838715011.pdfIn PDF document text
    • http://planet-for-events.de/userfiles/file/55502182610.pdfIn PDF document text
    • http://vizesblokk.hu/files/file/saritineteterok.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/53976712206.pdfIn PDF document text
    • http://weberstellen.ch/userfiles/file/6557412142.pdfIn PDF document text
    • http://micruts.org/userfiles/file/xibokejenasasoxiwem.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/29251385037.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/butigujorilidowezabemi.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/8jjmqcsqhvgjcabil1is6kj8uh/fatifuxabiterobojenur.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/7hg3abvq8oqi1g2ul3vd0vc0gd/18319927230.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/nuresogivubutinum.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/bad306a4b558d9c25cb1237be7e84fa4/81360157649.pdfIn PDF document text
    • http://sicompk.com/survey/userfiles/files/75607849352.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_off000177b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B2 11072 bytes
SHA-256: 230214f996253b165c29698af997ead3057c1a3f39a1892d00b6d39129a99429
font_01_sfnt_off00019161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19161 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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