Malicious PDF — malware analysis report

Static analysis result for SHA-256 702cd7fc13fa78db…

MALICIOUS

PDF

71.4 KB Created: 2021-09-18 23:55:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d6d305943ca83d78d673dc3614eecbea SHA-1: 10f8478049098eb8feefa709f37b72bd03f8385a SHA-256: 702cd7fc13fa78db818d79460b61ebdde641be2089868840b6e5c9c9bffb975b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pixomot.ru/uplcv?utm_term=the+bodyguard+kevin+costner+full+movie PDF link annotation
    • https://dzido.pl/userfiles/file/39644219350.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/161330415eac86---55970345072.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/80178724134.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/d854e9cb7abbb7feaaf6ee1d250f0e3a/wotumasapisilubapif.pdfIn PDF document text
    • https://implantologie-deva.ro/app/webroot/files/userfiles/files/ludisapekidabegogazag.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/42815764584.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/356337928ce74450d4b1a3c82544ff87/29913251271.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zikaramamuvexirukuxubuw.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/mlbq2gq4p18norisp0d83nbepa/98223485450.pdfIn PDF document text
    • http://3mfa.com/images/editor/files/65252718467.pdfIn PDF document text
    • http://oipipleszno.pl/userfiles/file/sogolowewiku.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/1rsu5srjrnojqljru8dr6sqgna/sikopisefuloxo.pdfIn PDF document text
    • https://nirmalujjwal.com/public/ckfinder/userfiles/files/28470739576.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/b916b94c7b27770418f56ca84b5ace58/86449458886.pdfIn PDF document text
    • http://tonwen.org/userfiles/file/mudidakosi.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161419e30b283f---gepaxogoz.pdfIn PDF document text
    • https://k31szmq42-nu28.com/contents/files/25675994001.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/63855497642.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/8120e39a8e6d9568891aa511c9510946/64675022852.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///modupizutofesapezuludij.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/72008901030.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/furasezox.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/71339213758.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366b3166128---347908953.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_off0000b5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5FA 11396 bytes
SHA-256: db53f94fee72f329c1fa497f0422a4ee9b7138ce52174eadfa5ada2fc908f61d
font_01_sfnt_off0000d082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD082 15336 bytes
SHA-256: 76b2f38591b05b67abf4612367ed32422e6b4c4cd1e11e156ccd5f4236b27258
font_02_sfnt_off0000f7d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1