Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e1710903d58258…

MALICIOUS

PDF

89.6 KB Created: 2021-06-30 23:02:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 917586d51269f2eb0a8755e8955bd658 SHA-1: 9190bcc5cd8667892e92c4371d83455c2161c31b SHA-256: 02e1710903d582585de7b83d0f8538b88264db4ef53b80c49c87607ab193fea1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to compromised WordPress sites, suggesting it is part of a link farm designed to distribute malware. The presence of a 'download button' heuristic further supports the intent to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=protruding+lateral+incisors PDF link annotation
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16083661998d6b---jasiz.pdfIn PDF document text
    • https://bursac.net/userfiles/file/21969245605.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/045cfa3442a2c10cad9e0242bf92f040/fazijekaruxiwizixowomil.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/92d568b6cc86f876ee7a84e5b9775203/juguxoxemifuwodivapamul.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/710cdcebmfgktjqfqc1ivkd0u0/tuwolo.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf4061f897---99182870602.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/25252434158.pdfIn PDF document text
    • http://chixue.com/uploadfile/file/20210611071430.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/01b5cf9a95e03f49e3bb665e58d8fb8c/94510385828.pdfIn PDF document text
    • http://secretlove.ch/ckfinder/userfiles/files/16827627974.pdfIn PDF document text
    • http://kme-kme.cz/files/file/24513218078.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16086566631f30---96792429544.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/82269079487.pdfIn PDF document text
    • http://travelport.pl/userfiles//file/fobidoruwojalena.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/71848811286.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/2224670633.pdfIn PDF document text
    • http://galluccifaibano.com/userfiles/file/57115177796.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/1688f5d7f095bfa9dbeef3d15392b5e3/85582214283.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b003c0caea---lumatasopifufosixalu.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b7506fb8ba6---46688100182.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c7f922c55---difek.pdfIn PDF document text
    • https://parklanehotel.asia/userfiles/file/10070678725.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_off0000f9cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CC 10648 bytes
SHA-256: d05f375f8af693c20ee1f81dd137d22aadc0325c9e44f6ae0a8bd5186b417e7a
font_01_sfnt_off00011211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11211 17256 bytes
SHA-256: cb3b00f73d2d0d72c31f13fe9f964d09571970de1c89efc8083cb190926adfad
font_02_sfnt_off00013f73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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