Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82bfeeef7785d6c…

MALICIOUS

PDF

48.0 KB Created: 2021-07-08 08:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: c0f68636784b997301de4f75955e9546 SHA-1: c831a7a4cd3dd160a6eb6d7e1f3393ed70ce707b SHA-256: b82bfeeef7785d6c8fbd13e307706d1e2d7b93b619387c4d7bb978099f00ce43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of numerous links on potentially compromised infrastructure suggests an attempt to obscure the final destination or leverage trusted domains for initial distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8493

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://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d1371ff6b---nufikolimuwogotikije.pdf In PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160aad634de7f6---kogobupanif.pdfIn PDF document text
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/tekofidazituzajinukuvep.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084d9ad4f791---jovekasa.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/lowogidasi.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/beligapurakosapaxi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16095da6d4dda3---fepubimibab.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/29593304056.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/3lg5u726k50k5ds9bsdd1o89v2/46116178969.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/vonafud.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/zakefetatereranebijevoz.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4fd62de1d7---99350687567.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/2b127b0c00daec0fbc85171a842c8591/zilovevuxerametirozepop.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/634a4285f3545f4f8fdd93a26b69c9d4/65234819554.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e318d840f---34199211320.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/zibep.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/xazevupexakegiwi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d229d10bb23---xiwulo.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/893c0f090ca00e198e9a623333cffd77/34754488130.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/danavimibub.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/vupatipepimuzumov.pdfIn PDF document text
    • http://fructusartis.com/i/File/50878343267.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b801e7ade09---19250581556.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/77500860548.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=misuse+of+power+of+attorneyPDF link annotation

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