Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc2ee7a9b2b4192…

MALICIOUS

PDF

84.1 KB Created: 2021-08-31 20:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2155691278824c17e2443f4914a83000 SHA-1: 1abcbb76e4fb6460906fc718303ac7bbb7297689 SHA-256: afc2ee7a9b2b4192f06199bf01f646ee9500f9d5f96359f578cb04e6ccf191f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the overall structure indicate an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://coretry.ru/uplcv?utm_term=my+toilet+bowl+keeps+filling+with+water PDF link annotation
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/6287f25c42110d7d8cc809bbe2a2f33a/3971452310.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/51499299057.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/b0a745b630b01721f5a905e1661dccaf/94144114352.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607735d8b2983---tesilukevazuxolison.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///90243041386.pdfIn PDF document text
    • http://xn--989ap7r0xbd5x.com/upload/fckeditor/file/34679639477.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/9ejjmc0v6m62ir5tj8rjnlfu5f/82993564252.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/goragabimezumarimafudif.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087b4c26611e---zogegegomevow.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/d64facc2e70184c8ee0086528dfeca60/16865757243.pdfIn PDF document text
    • http://tamlaproject.com/userData/board/file/72464613895.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094603b9e70b---zuxeburowavesimatif.pdfIn PDF document text
    • http://energo-market.ru/sadm_files/sopiderekujipexex.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/8b5b81e4c17e903fd5440f3f07df21ae/84849542579.pdfIn PDF document text
    • http://dreiseengrundschule.de/files/zozipemiletapo.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/xipesikobeg.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160d991d90bb20---tazar.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071fdadd863a---12643726964.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/vofubudufake.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/dfgigb22ffiig7hhrs2t4dhfgq/ririfegekilojovemek.pdfIn PDF document text
    • https://orangcar.com/app/webroot/upload/files/bexawosenomanageji.pdfIn PDF document text
    • http://debsluxe.com/clients/1/17/174397649ed9f07baa8f9d9f48c72a4d/File/pogogeginezex.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_off0000e167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE167 11064 bytes
SHA-256: c6adb58fff8c336ee5436ee04a1603f80a3408a60954e2b5cbb1d2c38b3b22f1
font_01_sfnt_off0000faff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11311 18276 bytes
SHA-256: 3368f0e712d9822e931c40e1d1b6c1e3284bf8f7d59f463e13a2187f3cb14ed7

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