Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f781602dcb78b0…

MALICIOUS

PDF

82.5 KB Created: 2021-07-26 14:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e68f2e8c6bb9f12c30b8454b1140f2ec SHA-1: 12e727ae4972845bf78937058f0816f48038f37a SHA-256: c9f781602dcb78b071977f8345dee4ddaf208245c42feb1bd4508d805dc81cc4
154 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous embedded URLs that point to compromised websites. These links are likely intended to redirect users to malicious content or phishing pages, leveraging SEO techniques on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5751

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://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/19c3421d7cf8852af6ac8b3d86d17fad/4600756705.pdf In PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/6f4ade96a82ccd89716ffec48d0133a7/41021047103.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/wezerofulebudawilol.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/f74d9e0dfa1b375b85fb6624d59b3bb5/73345552282.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a751f4c72c3---vejofusazelu.pdfIn PDF document text
    • http://bptramptour.pl/files/file/67288670247.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/84797032707.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/1c81d4f55fda04c11c9704e3ec5d70a9/53993296757.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/23icmfnhng079rurlbeen8ddsa/liwupapujewam.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021061019044173499.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f8033526374b03128ebdf01aeaaaf7dc/10700607336.pdfIn PDF document text
    • http://rocincorporated.com/domain.com/images/dynamic_pages/file/bizobapusugozuwaxegalife.pdfIn PDF document text
    • https://propertiproperty.com/Uploads/userfiles/files/80544469466.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16074d6a3b26fe---tituradafematur.pdfIn PDF document text
    • http://detikakdeti.ru/img/file/segulufem.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vukutejugexedilituvonowew.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16088bc3212339---21276645953.pdfIn PDF document text
    • http://faradbox.pl/files/file/56278322108.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072118a2d0ce---xajojeveranizuseda.pdfIn PDF document text
    • https://betenagro.com/sites/default/files/file/19960618251.pdfIn PDF document text
    • http://3sdent.com/upload/files/27300489351.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098665351985---27565001815.pdfIn PDF document text
    • http://kurskodkb.ru/page_edit/_samples/userfiles/files/84893442064.pdfIn PDF document text
    • https://viboot.com/ckfinder/userfiles/files/dorigilepezumitogoreme.pdfIn PDF document text
    • http://poiskvod.ru/images/file/56227822095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+make+trap+music+in+fl+studio+20PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE8 11292 bytes
SHA-256: 3545b3f0f16df02d041ae815dd1ec74883ed790671616bd9860f6f7946bbbf7c