Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f4804934cfb66e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 12:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5ee3e16b2a7b3b1fda6a384a5c2a25b SHA-1: 50eaf48e094533d61a5b3bb09d211188b3bb2cba SHA-256: 14f4804934cfb66eaad52f2e8cfd72a473cfe0c2eb13cca4f6fcf5792282b7c0
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content. The presence of a 'download' button lure reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160abf40887e5a---gizirapesixepulibagakuxe.pdf
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/f505a72ef6a72780190702500dc913f0/21077859793.pdf
    • https://bisnismedsos.com/userfiles/file/jitizaxit.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa727ee8aa0---57886087008.pdf
    • http://dentish.ru/ckfinder/userfiles/files/38205726359.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16096d05f0f682---fowupovafijukugul.pdf
    • https://dnmpaint.com/sdcc/images/file/fuzumenana.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c72b966235f---tagafu.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1608000873d273---87183083008.pdf
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b869a56aa46---62773982562.pdf
    • https://nazrabilisim.com/calisma2/files/uploads/94431690744.pdf
    • https://printjet.pl/pliki_user/File/17137668577.pdf
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080da3b579f6---mojuxusexena.pdf
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1609cdc7de1378---rotelekatokadawi.pdf
    • https://capital-tic.com/upload/ckfinder_temp/files/20210528171529.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/gp006hhc0p3udr9v0l3lvvpos6/63462655998.pdf
    • http://rapet.hu/files/ponuwilajebogalo.pdf
    • https://trellisdundee.com/wp-content/plugins/super-forms/uploads/php/files/fa95038f4437a55b69e597047c4a00c6/nuvupajilurexizujepe.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/e53jpc4fnhurvao0aj986mk205/38317038831.pdf
    • http://swotaweb.org/img/upload/file/jugitelememeleto.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6aafc33974---zutozimakumujatuzuma.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bf38e1f6c0---48771183795.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/gtfbe3sl8d2elj1idkisfuliu4/japivodavirobidi.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160afc43282473---sotofuxilo.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/7ebe77edff8f1046829352613fce98d2/95370629978.pdf
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104291815252059.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=intelligent+investor+book+pdf+download
    • 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_off0000d84a.bin
3ec60b1e82b30293db48fcfe339bd0373c5fd15b349936933b593dabe9149c74
pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 11008 bytes
font_01_sfnt_off0000f19f.bin
600510ae5d200bff6251e4e6fcb861c6917ee694a703f8ca66e59369a4e1f7f2
pdf-font-stream PDF embedded font (sfnt) at offset 0xF19F 16764 bytes
font_02_sfnt_off00011cbf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBF 16792 bytes