Malicious PDF — malware analysis report

Static analysis result for SHA-256 64e0fc4f43be9961…

MALICIOUS

PDF

96.2 KB Created: 2021-06-10 21:21:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4af73304df08318d5ed98949c22bf0e0 SHA-1: a9e09da1b3cb03375fb4b04a0f03e89e2a02cc39 SHA-256: 64e0fc4f43be9961e54584a51fe2ac4e488442b81f7d301cef01936063a14a2d
154 Risk Score

Malware Insights

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

This PDF file is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous links to compromised websites, many of which are hosted on disposable domains and utilize WordPress plugin vulnerabilities for file hosting. The primary URL suggests a lure related to Windows 7 ISO downloads, indicating a potential attempt to trick users into downloading malware disguised as legitimate software. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9574

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=windows+7+sp2+32+bit+iso PDF link annotation
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e852c4a2c6---gugudol.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/94bf452871372c135bbd767e92df9e1a/tufogepeg.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/9321f2149db5bc7196cb46b0805d7d9c/45853440080.pdfIn PDF document text
    • http://dalaichau.com/files/kewuwalonenomo.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc83ab0a880---97244890970.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/xelipona.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/81816ad2ec18ae4ba03474b3fd9a3a29/vokuwulisokobividibuj.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608abec66b112---54121416147.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/86b3f6e55ca5c97560edc8a3c4d979bc/65557858784.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095fc954b7ab---91196359101.pdfIn PDF document text
    • http://premium-h.info/files/files/kuvusokoxogebulamukumuxi.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/vimafupojir.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/4b580d3bb9a016cbcea30aa9fc927351/90150662958.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e95016440---wozedotakoselopavasokub.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/bcb3aba536cbcd37530861355b34ed7a/mufidumifuziza.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a29eec19a7f---mewete.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16556 5236 bytes
SHA-256: 8149aa916a381b000c78d89ddfad9902b05dbf8f88b86a06ce736688e7758c99

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