Malicious PDF — malware analysis report

Static analysis result for SHA-256 3464a5101b49e69a…

MALICIOUS

PDF

60.2 KB Created: 2021-05-18 21:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ef7af7f2c2a1a081c684b09dbd2a780 SHA-1: b5d1ae1666ff66401f98cffbe921f89f426272ed SHA-256: 3464a5101b49e69ab6333960fb1be3798e172e7f8c4560fbc3eeea30ce3d3bcc
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to compromised WordPress upload storage, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to present external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8123

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://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5f87b8cdd---15646415680.pdf
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817072eed84---xokezedezo.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a25ad75a87b---5198435016.pdf
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb1c06212b---rovuwumubikowisopij.pdf
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/160750a470f33b---5342179946.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe2b33fc9d---kewexigupusalamolaxu.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/2585788f0acfbb2357d0b0efafe3b87d/kibekijututego.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/596eb3c07b7536337929c5198f228bb9/95301837445.pdf
    • http://nw-line.ru/generic/uploaded/29738443285.pdf
    • http://billedbutikken.dk/articlefiles/file/pegujoxaxefanawi.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/5fafb6445eb21a279fb594f514cd88de/93157780966.pdf
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094d7879b074---87714648375.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeb686757b---nelolowoxalovobatevo.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/h27rn5hvf5dqdn067q7g8c4c7s/44403374301.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa8174330---futaweduranumavi.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607898890ab3a---rikolibubegexodu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=ejemplos+del+signo+linguistico+mutable
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52b.bin
6d3d09b2c415b22334b12220b58c6499e21bbcd08b59358e5bbe3b10699b3c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD52B 5472 bytes

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