Malicious PDF — malware analysis report

Static analysis result for SHA-256 3462b8ea0f5a7627…

MALICIOUS

PDF

54.8 KB Created: 2021-10-02 16:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b036b47201a7a7c47adde1184304a7ad SHA-1: e7cd5a84a34454e91cbec77ee5599f0d32a07b2e SHA-256: 3462b8ea0f5a7627711357f7c3b5179b11e0f5ff174f2337572a71ae540c3e45
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress uploads and other disposable hosting sites. The presence of 'utm_term' parameters suggests a phishing or spam campaign aimed at driving traffic to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7526

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://queure.ru/uplcv?utm_term=pig+launcher+operation+manual PDF link annotation
    • http://fzcce.com/aimgs/uload/files/lefilabovofifixigilutan.pdfIn PDF document text
    • http://studiotecnicomancini.eu/userfiles/files/36191026195.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b75d464abf---77590759332.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210906033439.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615358c4aea98---18720733783.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161342b55dfeb5---24306939275.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210908_5E653879DE357B28.pdfIn PDF document text
    • http://abwcolley.com/uploads/files/75816185707.pdfIn PDF document text
    • http://bancodevida.com/bancodevida/admin/images/image/file/50945811750.pdfIn PDF document text
    • http://kimhoatra.com/upload/fckimagesfile/46387219395.pdfIn PDF document text
    • https://cinemaparadiso.site/uploads/files/wukaduzer.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/161539630b44e5---volokadaketadaxamites.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7ba79dea---fajefu.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/70789420796.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/28694469638.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/49293046364.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/potiguvananuwedemorimoke.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/99446395186.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/mulonelozosuxofuxezozo.pdfIn PDF document text
    • http://vitrine-prof.com/files/disilixowepelonogob.pdfIn PDF document text
    • http://snailgame.ru/upload/files/20210901110626.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16157c7e4a6542---25985817291.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/90207282869.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB154 10752 bytes
SHA-256: e0b003386c01ce23b35be51f5476c7baf07d379a7e25ec9c74c73a5b9e3a0d9b

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