Malicious PDF — malware analysis report

Static analysis result for SHA-256 1408d8dc54374f3d…

MALICIOUS

PDF

83.2 KB Created: 2021-07-01 00:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e5a534c39c5d2470525d5d04e14a1324 SHA-1: c725845250b41b77fec657ea0326761090e2994a SHA-256: 1408d8dc54374f3d0d4929eee825a4a886cb525851610e7f21d79de8d4362f2f
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage attack designed to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2993

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://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d91b8bfdf0---wusutovagi.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ed493a8f---63613548740.pdf
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/6866b165d11c4935648432ff5f55f4e1/bikababolop.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94771d345---busiziwiti.pdf
    • http://nedirajtebosnu.net/userfiles/file/gelawuxexi.pdf
    • http://bscsaoner.in/ckfinder/userfiles/files/42326009471.pdf
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160961a09af990---pareba.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc944a8dd---90447739620.pdf
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/93858839657.pdf
    • https://eyetracking.pl/userfiles/file/pewemojabanedafetumuwowe.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/1ad2cecd758f721f66032c4e506dc0f1/44409634545.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721fe283e4e---77473879721.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc82b1fe42---40550155292.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d23ae0f18a---17917115486.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/18850509268.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0531efpesk1elhfolim0bnpjhk/65633738912.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f17dfd82e6---larilepakepolemuzamoj.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074907add088---8551933901.pdf
    • http://wo-kop.pl/userfiles/file/30473966516.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/a4r9qh0l4ufs684m9jbt4u5c02/kogerobup.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/c1121bdebf277961b88920ef961a24ba/95808527686.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/nkaiqfothaglat82qhh4e1eudh/tijofirobetirij.pdf
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b664c667235---buvupu.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd61bce5f7---nivobare.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a1766a8119f---dufesatotapa.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c69902045a---wigurejozezokefebejupej.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=exercises+of+narration
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f321.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF321 16792 bytes
font_01_sfnt_off00010b33.bin
585172cda73b74eec66004e643d463ddd40a4cf10c32f9c90e2f64b684e49324
pdf-font-stream PDF embedded font (sfnt) at offset 0x10B33 16756 bytes
font_02_sfnt_off000136dd.bin
25575146abc396fee5244e73dc9f6ad6fded690aecf735e278ab106b560ee188
pdf-font-stream PDF embedded font (sfnt) at offset 0x136DD 10368 bytes