Malicious PDF — malware analysis report

Static analysis result for SHA-256 c078a108abf573b9…

MALICIOUS

PDF

69.8 KB Created: 2021-06-05 02:59:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91a7f4dd339c60e218198c8e5448467b SHA-1: 1b40f1e6e2b73e6503e693d6007cc461523f7d30 SHA-256: c078a108abf573b96f8df75c7a8b4a5b3a83dede015efc52928702585a2003b1
156 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress upload directories and other disposable hosting, suggesting a link farm used for distributing malicious files. The presence of a URL with a 'titanic movie video download mp4' UTM term indicates a lure to trick users into clicking the link. ClamAV detection and ML classification confirm the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://nomylo.ru/uplcv?utm_term=titanic+movie+video+download+mp4
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe397dc844---73726598079.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607487fe4d2eb---fovafojofise.pdf
    • http://anhuicrew.com/upload_fck/file/2021-5-3/20210503075646527231.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/63eda37d74fd2a5f72b492b32a8c1375/15428581838.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec23fe8233---rurukukozage.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c710d8f462---lapajuxupifidaninaxawomaj.pdf
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/65101847949.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b54a7ca967---pefagivuwawirumina.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868626404a6---52453907769.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160baa0a062095---rewikabedigupamonepivonol.pdf
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/5524b66b9b47202ac5b59a6d18fe11bc/60128953806.pdf
    • http://bjaimama.com/data/upload/2021/06/file/202106041937189128.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/g2j7ks9dpfuk43ns290b4kmag7/32516118154.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893a2fe8a8e---julusuwanabokowowiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087f0fc28960---75680129475.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d66b.bin
4c738f0e4c6e3ecf429af01f5aa2da4e7bb8b3dbe73cde7706d7d10cbc46fb94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD66B 5132 bytes
font_01_sfnt_off0000e7ed.bin
2867826d299cabf2db2c445dcc968c3f600b214fafe9902cc2d16e079c5b98b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7ED 10124 bytes

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