Malicious PDF — malware analysis report

Static analysis result for SHA-256 14b5df3c9c53f611…

MALICIOUS

PDF

86.7 KB Created: 2021-07-03 00:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8200abd731f89fdb48b78dddd0665d36 SHA-1: 6465e81bcefb6e4d0c87738039acf4a08177b650 SHA-256: 14b5df3c9c53f6114923bc1609c71f8c606b1164f9281f10004c92071c99c72c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a phishing trojan by ClamAV and flagged by an ML classifier. It contains numerous URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure indicate an attempt to lure victims to malicious or phishing destinations.

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://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1177d5ef6---28276366691.pdf
    • http://geoplan.su/userfiles/file/95285984741.pdf
    • http://armanetti.com/images/navumevo.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/2sab1b8vl9sle3qa536rrgq7ag/64604672937.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f65k9u0krnlc07m3pd4uf6a0v/xomijojixopotasuwadudivon.pdf
    • http://www.lnk-creation.fr/upload/file/21668370499.pdf
    • https://ajitcoatings.com/uploads/petimudarovixojofagufu.pdf
    • https://rubin2000-distribuitorshop.ro/userfiles/file/kinidejomawosote.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607cbb3f47fad---nesuraxuvogop.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df7e533ba38---68236153999.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/jrc4dvotpqtief5vblkfqjed8i/lunikididetobevow.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b852551fd---52958829172.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160de20e500d48---lujoxasov.pdf
    • https://esz.jp/img/editor/files/82461821353.pdf
    • http://www.moyekolodin.com/files/depejifogarozalatafona.pdf
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c524411f408---60188618302.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806c0591b72---41889989286.pdf
    • http://pogservice.ru/userfiles/file/pevinotorakuzeguk.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/cojlktrgrrst6u2tl2go8fdkdl/bawilasutep.pdf
    • http://all-pass.com/folder/editor/file/depoxojowifawirabekuserik.pdf
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b2edb233814---joselurezipededijilal.pdf
    • http://acudrved.com/ckfinder/userfiles/files/dobewutuwa.pdf
    • https://agrilaui.com/userfiles/file/vuwonato.pdf
    • http://bertrandetgastineaudesigners.com/userfiles/file/butalozefine.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608b29ad14540---90669122492.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=baby+pink+square+acrylic+nails
    • 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_off0000f049.bin
efbe884cb20f914fc86ce83e4c75719ec85f6e6fe872608b675678f3fc3c8a32
pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 17192 bytes
font_01_sfnt_off00011cde.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDE 16792 bytes
font_02_sfnt_off000134f5.bin
04e2c0de8e5714616ac026ca580dccb76c9153c93831881182428f7e68be9d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x134F5 10792 bytes