Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe741a5a1fdacd9…

MALICIOUS

PDF

85.2 KB Created: 2021-05-01 23:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 734f596733cb5a39d8c005d4b9b7c58b SHA-1: 11b4e603e834c9b31576b54ca77b51aa123fdc0d SHA-256: ebe741a5a1fdacd9a98af13fb2c76f161c4d95b300d04e0ef41d5cd86f83d925
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing pages. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9066

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://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/7dd32247a2361fbbc808489c685e5dd2/gimulevageditipusaz.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160879ef381227---zodanedokonutudofiba.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/9flo3o0mmc3trmrq0k6e326v74/wamurosiwojozuwedij.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/j3mjprjdgkmcag4oqj701am1a3/45165275435.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608770216713d---sojebalavevejefawan.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/8694b052bad80925b8b5acbc8fbba895/74123232597.pdf
    • http://aliglobshop.com/userfiles/file/vexipewususelovelozelix.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f605f0141---vidafifaza.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/1mkgg3qcsrjg85kjjd778vbds3/rodaloxodase.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa2b76929f---20334943239.pdf
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/6ee1814eefb4d690e69b73db519b4918/25289561578.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/4hlsfbng13239e32mf4o52ink4/13813157313.pdf
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/80e37397a4b5c59f5de537b6da6679d2/gajetukitim.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce76d8a71a---86348517831.pdf
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074399d12243---78544334921.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=osaka+transportation+map+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e6.bin
c73cb0d150a6351014ef8c9cb24a877010d4bb3c6237f4ec7a86e817fee3671e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 8260 bytes
font_01_sfnt_off00012002.bin
b3d186c94e4b31ec08123738d8a7ee32c73591625106ef2220441b1915d24a9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12002 5248 bytes
font_02_sfnt_off000131c8.bin
447386dc7d8dc4ef51c652c48f7662cf186c65dfc0f501e0bfb69aa52544c331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131C8 12112 bytes

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