Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd93f4f52a62cf5…

MALICIOUS

PDF

63.7 KB Created: 2021-05-27 20:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33c4bfb820643810cb45018555def7d1 SHA-1: 7fb39e0c4d450d84a4b1381cb07a9f1922496a10 SHA-256: dbd93f4f52a62cf5b12c27892e6f3bcbec29efd2e60f8023771aec662d221087
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is classified as malicious by ML models and ClamAV, indicating it's a phishing or trojan delivery mechanism. It functions as a link farm, directing users to various compromised WordPress sites and disposable hosting domains under the guise of a search result. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8278

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=what+is+the+difference+between+strong+and+weak+acids
    • https://securitydm.com/slicice/file/66394392033.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a567b2ea85f---maxijapanawexabod.pdf
    • http://temple.mo/userfiles/file/jekofogosugok.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2q7nhcmf76n8oc6vdtlfkkdjae/94946972098.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/230b8f386f5835aee2a61571f413acbc/guripipowudibizepubuxu.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609247c5a0386---gonewofamu.pdf
    • http://palami.by/images/file/55848328123.pdf
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d232160bf3---56351159103.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f8f24c01f---kanutafadudaramig.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b619e7964---64021401244.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5fe6df592---natufoferexo.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/hmgt4okl9281h2rotu3qnlau6d/46654905791.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c7c1459cb5---70453198282.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d48b.bin
c036b30400e8b601300fda74ea326176f13a574876df5cb69eb68320fa64a953		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD48B 5560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.