Malicious PDF — malware analysis report

Static analysis result for SHA-256 d226b775334513d2…

MALICIOUS

PDF

111.0 KB Created: 2021-07-02 03:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fc20edfbc2954e19c017cdd1692a1769 SHA-1: fda66c86f407e9d6b1968e18874c3d32e08708ce SHA-256: d226b775334513d2684c7e7f6449f741478733f45d8e06b8faac1da617be7d8a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns are consistent with a link farm used to obscure the true destination of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6141

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://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/9iv7l2mjcegc46q9khcqn53ioo/28876628697.pdf
    • https://resulgame.com/calisma2/files/uploads/24004965196.pdf
    • https://ms01bet.net/contents//files/xigiwazipokuxu.pdf
    • http://absolutelyneon.com/userfiles/file/ruvijo.pdf
    • http://casaalu.com/luutru/files/volebadaxibosinukot.pdf
    • https://bharatbiodiesel.com/userfiles/file/jilezosogekororovosasagej.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8ac5b3d65---dusabaxejumekufikiru.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c636a0ae694---11798161711.pdf
    • http://turagent007.ru/userfiles/file/zizaxugulobun.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/c78579pmratpqnt54km66vd6gu/najalikikefax.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f122b5495d886d95cb3846f99524f429/81231910337.pdf
    • https://cplastik.cz/data/cms/file/waxifomisufizofunov.pdf
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/64963145602.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608450aa96188---11682474130.pdf
    • https://pestresolution.pt/site/upload/file/jumazugun.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c11f04d56---15790973792.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160740dbde6efc---morazuporifetut.pdf
    • https://palcev.ru/userfiles/file/besikiko.pdf
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/8eafa9668aec60a17a8dd2a0c0f24a84/kifofogadakuxe.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094edcae53df---44293858288.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/ge75b31ehlmp6gvfo9d7qog8cg/7864556323.pdf
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/d06fab08445b7c58c2f6cbc3e503c2fb/wepuz.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608180cd726f2---43898787886.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=adonai+meaning+in+hebrew
    • 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_off00017444.bin
1568a60ba67a64b94e7d90202f5a8c994b058cf3c75c0acb7b3b1a975af064e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17444 24896 bytes

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