Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafc96b471665638…

MALICIOUS

PDF

89.2 KB Created: 2021-06-26 18:53:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 778b98231d068ca94072b9351ce8205c SHA-1: 3032ce4f47e3a96d7bacd0d757b385ecf2c2b8dc SHA-256: fafc96b471665638b5bc77c93a99762fc24e86cb04c9148c64143677fad4bf37
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://irlanc.ru/uplcv?utm_term=short+story+of+a+poor+little+girl
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/dfd0063b4b0f8462009f1166fa6a0fe9/52255695348.pdf
    • http://photo-preiss.com/upload_files/files/22595455264.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/068c92b668875bdadab3589695b19cf4/sibubiwedofisunikifagit.pdf
    • http://anatolianlgs.com/userfiles/file/98975841369.pdf
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160b8ea5c10159---nolul.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713e77f3137---leripuzikoxunuwoj.pdf
    • http://eros-arena.de/eros/userfiles/file/nutatixaz.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7c47760f3---nujomaget.pdf
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/nitigoxepepa.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e60488de4---bevezowoxami.pdf
    • https://stpeterscbs.ca/ckfinder/userfiles/files/subara.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c84665fe09---poxexuxosow.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af9ad9b9276---kakiwevowivifoji.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6cd50ae81---pitudigaxogiladusike.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082fc9e2fe4b---zilejorifinuvotob.pdf
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/33475e7ef5271c2deebb8c883628a34a/vavarumezoriletekimo.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/f0eoorok1juajt2tebco855p98/78227506324.pdf
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac87c664c2d---jifomi.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd644cd164---83079856897.pdf
    • https://benqmusicworkshop.com/fupload/file/begadesowi.pdf
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c80d00f6eb---kebenesejigifirugobog.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/r0vcfv5h7sko906732crepcn9a/16551447747.pdf
    • http://nutranghongngoc.com/media/ftp/file/mumawulefuxigir.pdf
    • http://clairvoyantinfotech.com/demo/images/bevopemozepuxad.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f2b2edc640---raxumubopuga.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f86e.bin
770262ff91ebd44270bda8b10acbfcc4b3153b6031084d98246618c5c2c1ec71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86E 10724 bytes
font_01_sfnt_off00011134.bin
754bc2f147b70fe6dfc8bc46171bac4ec5275cc9aa040f0cf5b8a5c1cae4f6d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11134 17944 bytes
font_02_sfnt_off00013f3f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F3F 16792 bytes

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