Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7ad14ff600cb5b…

MALICIOUS

PDF

74.3 KB Created: 2021-08-28 04:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ddbb4bdc99447eebf8cdaf4b06d352d6 SHA-1: 98e8a02acdafbb4b57d2aec4564e9cbb423a83ca SHA-256: 5d7ad14ff600cb5b1e372e1bfd3b2dcf55115ebaf7373802d994900d64fa53cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous websites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of external URIs and link farm structures strongly suggests an intent to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d453bc5a916---34179660898.pdf In PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/wexiwud.pdfIn PDF document text
    • http://cobmedia.hu/include/95438407222.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160e669be28c1b---nufezomuguwulixitoluvon.pdfIn PDF document text
    • http://gospelpour100voix.com/fichiers/newsletter/file/zetisisaneze.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/63713986429.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/3e7ae60384e9a76ee6430105282ea49b/44733175840.pdfIn PDF document text
    • http://nextgenship.net/upload/file/20210725162723057967.pdfIn PDF document text
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/jibax.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fabf4174ea9---30046329746.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/fanijugodufegupowetudep.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/76785590963.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a5940852a---80382340979.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/9256257265.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/82584967615.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sidozejur.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ef21d7a8f---25587649166.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/40617e2a133b1896fea3c490db09c163/juxofatopelo.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/pbrtaoc0r1vciafrtv7ra5v1pd/nelumemaluvovi.pdfIn PDF document text
    • http://tdvvietnam.vn/webroot/img/files/purowa.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/touq3hrmo7oo891qlo5lqavbbk/57020941628.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/4799732538.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a2d91009af07d8fb9bf10c00a8aecb83/sefosexasinemovo.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607430cfc73a6---zerumubonasilutebesax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=healthy+baked+codPDF link annotation
    • 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_off0000c3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3F5 15424 bytes
SHA-256: 0510fa124ead9fdeaffc02430d457c4154b94a78ca1092d32957f4623acbc23c
font_01_sfnt_off0000eb97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB97 10340 bytes
SHA-256: a11e334fe2ffcaaad4a05103641b2e5240df31aac818035b85ed5736132b59bf
font_02_sfnt_off00010309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10309 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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