Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e998dee59f25952…

MALICIOUS

PDF

93.8 KB Created: 2021-09-19 01:27:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 743afcc5b443e6ed5a99e596219aec4f SHA-1: 460f270cfd159aa8dda0edf9c8f022a961d9bf2e SHA-256: 6e998dee59f2595257d4d641b4bdd0ff8a1ae8a9c004413c731e51b76b0c3073
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate the PDF is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://allytemp.ru/uplcv?utm_term=mt+locker+codes PDF link annotation
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/0cd79367439d0fa542c9509e58a36dd9/35254198304.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/gesibodopedabelukidefime.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/82971311286.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/42517566291.pdfIn PDF document text
    • http://whuntex.info/userfiles/file/41910868305.pdfIn PDF document text
    • http://prasongp.com/file_media/file_image/file/zemowufabipi.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/mosobatekawe.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff5c35b257---mefiwodesizidipavatuna.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/silufipivodavuxenavusin.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/13859676183.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/luvaxifawabijumimuzed.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/gotefezulopa.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/moduzemubiza.pdfIn PDF document text
    • http://powercleanperu.com/cms_powerclean_2015/sgi_userfiles/userfiles/files/3817319764.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/zosiwogegabusiporu.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/xokelozononimevivemekure.pdfIn PDF document text
    • https://stayinbranson.com/ckfinder/triplebuserfiles/file/87546544983.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/meterixumakajejafobofuba.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e82f3e1137---sunexasatikidogosogi.pdfIn PDF document text
    • http://tlumacz-francuskiego.pl/userfiles/file/47214932192.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/968333f7d9e976fed08fcc65950eb34a/55902410510.pdfIn PDF document text
    • http://jobsandhi.com/uploaded_files/userfiles/files/92423782873.pdfIn PDF document text
    • http://studiolegalebisantis.it/userfiles/files/sijolobutoro.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161353afdaad47---wogigipopubigexibilejuwad.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001278b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278B 17036 bytes
SHA-256: 6a6f92715cb71fdc1629f2a297179d253e70326d47e71ed4d15d4f17e125cd2d
font_02_sfnt_off000152f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152F9 10092 bytes
SHA-256: 5d4236daae80d19c3f662f5f993700b7864d9c482d92d8812cafb64f20368953

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