Malicious PDF — malware analysis report

Static analysis result for SHA-256 91497c8bb269b848…

MALICIOUS

PDF

63.8 KB Created: 2021-08-04 13:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0d5d88c7778c3b14f2afc92a464cef37 SHA-1: 05fa9498c91349362be0042777e99251df0483a0 SHA-256: 91497c8bb269b848a5968d4120e6368f02033bc97cdcb526c933dda9d256bd1c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, with several pointing to compromised WordPress upload storage. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the structure suggests it's designed to lure users to malicious websites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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://coretry.ru/uplcv?utm_term=chaar+sahibzaade+full+movie+download+in+hindi+khatrimaza PDF link annotation
    • https://www.corpeverest.com/ckfinder/userfiles/files/73591225100.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/zarajef.pdfIn PDF document text
    • https://vansuloi.com/uploads/userfiles/file/raliponuzorufo.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086abbae9bd2---81414089786.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/godevizowabot.pdfIn PDF document text
    • http://wwstationery.com/files/file/30861358005.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b8ec7332a---92748318847.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/16023472058.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aac09b05ea---49669416696.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b77d5b31e2e---tupixiwonakukafulajaji.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/64efc9a1205d0734bfb2fd3d29c5d7a2/85143816492.pdfIn PDF document text
    • http://x04ydivan.ru/userfiles/file/59606285217.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/3c6d369dbdf017180b39e9bb59785b16/lasebokekefubesij.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/jozemo.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/p141ahkmr5f839jbfrfaq2knc3/70395532636.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac1ed94971---26287634437.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160838ef07c08e---xasisasawigu.pdfIn PDF document text
    • http://mgtofubbq.com/uploads/files/46064299327.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/73106936958.pdfIn PDF document text
    • http://bagliodeimille.it/userfiles/files/nebedowumibuzomemugijus.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cb878b4f---11912091642.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/n7v2i1ltppvefcalkrcva7m3rl/wonubete.pdfIn PDF document text
    • http://congtyvima.com/images/Download/darisef.pdfIn PDF document text
    • 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_off0000ebfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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