Malicious PDF — malware analysis report

Static analysis result for SHA-256 722e33c6e54e29ce…

MALICIOUS

PDF

69.5 KB Created: 2021-05-26 00:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a699547e3733c143a72bd6ca08825395 SHA-1: f58fb672d2d654a68a06d872e5ed502765820424 SHA-256: 722e33c6e54e29ceaff544f912593694bc80464fba1bdd2045d95b46969590ce
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9032

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/2323ba80cffcce93d9a4e278e67fea28/zegerajunimenu.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/bmt2f7rl3d9lgg2cdp12cg5a6p/71457091384.pdf
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/edeab67f13e8063aafb6fbad72ba6f9c/bumoxuxu.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/e483d31983bb33db64b7812d6aff0d01/pinomigufogaza.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/36f1f41581d185abc332f247702c04ad/lovefujufavizesagefok.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db03d863a9---62699820937.pdf
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/739u2uq8hc76fg2iblaeo98bl4/wadevodajeposijovisener.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085772fc91df---95988548449.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081d72e47d5a---5304849594.pdf
    • http://dobraukraina.org/sites/all/sites/dobraukraina.org/files/77415433062.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6a30e13f97180cfdc3b7a1cf3e343c62/subesiziwikigibiluripev.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/255fdd33dd081becfbaf9bce28060cb2/89691777285.pdf
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hdi16e4m8u7mra3pele309ilf6/91636132995.pdf
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a631f70c520---72953964519.pdf
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160785c0b689c8---pumokan.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/f39e5c861ea0865d4b18fa6b189ac870/femulamarosobizada.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ac4883ab4---nobasivubebofunem.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ch+899+chouchin+clock+replacement
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e600.bin
882c1b7d003325616d89bb0ef12f4f83ff4ce1c0b8aacfdd30ea954748381c9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE600 5312 bytes
font_01_sfnt_off0000f7e7.bin
ee42ce016d27fce1ea16e6d0d47828004042ecba8484c109b45c3da49ec8f61e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E7 11120 bytes

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