Malicious PDF — malware analysis report

Static analysis result for SHA-256 101d0e3914f076ac…

MALICIOUS

PDF

72.1 KB Created: 2021-09-05 10:43:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f86b15e603fba7bd4c7defff2099cb09 SHA-1: bd4c38970265b04ad599cba2481f180ea6b6ce3f SHA-256: 101d0e3914f076ac984d21858658c222dad1eb70beb532df9c8b1aa1d2574483
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary function appears to be redirecting users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6691

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://medvor.ru/uplcv?utm_term=rational+self+cooking+center+pdf PDF link annotation
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/dcdc3e5fb4524c1850098669685443bf/fijifeseb.pdfIn PDF document text
    • http://studiopetrilli.it/userfiles/files/gikepesabudufejafenov.pdfIn PDF document text
    • http://danangsculpture.com/uploads/image/files/gudox.pdfIn PDF document text
    • http://hydrem.ru/images/file/gejub.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/8396182057b1a65059505d81d5a083fc/38041170548.pdfIn PDF document text
    • https://www.tunnel.de/files/uploaded/file/tamalaguluzuzejalagetovov.pdfIn PDF document text
    • http://signauction.net/userfiles/file/nuvarizofosenudosi.pdfIn PDF document text
    • https://supermagnum-bg.com/ckfinder/userfiles/files/81020714346.pdfIn PDF document text
    • https://estoniapools.com/contents//files/jujofova.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/zobofapivivolimizijop.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b66eeaa927---32171670000.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d39c97c8679---bodevuguwoginopukel.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/19943499215.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/17174469382.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/dugavuxoxitesexeleruf.pdfIn PDF document text
    • http://profil-metall.de/content/uploads/file/komegugiwep.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/sutiwozupowuwujop.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/78169238018.pdfIn PDF document text
    • http://dakmet.pl/upload/jefobonizu.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/xaxizesobaned.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b79db588eec---bikirewutigaxepazi.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/261210244126.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/161181974ce501---radogadinif.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_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 18940 bytes
SHA-256: 24c3487ccd5bbaca18ac8ddfeb4eca8d6a2fb06793837066f375e1af3b55696c

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