Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afeebe83c4c6ee7…

MALICIOUS

PDF

91.9 KB Created: 2021-09-03 00:47:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: da2ad0e2e4bbce804eb91dfde919b498 SHA-1: c249bcc6254240c3541957eb7802dd7cc15b721d SHA-256: 6afeebe83c4c6ee779ef58e8c599b919be020ece6170bb32ecfd204d7d778e70
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The file's structure and the presence of multiple links indicate it's likely a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=zoll+defibrillator+pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/e5700c812fd11e9599fdaee32a6681a0/15733353942.pdf
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b907b8869---55833353346.pdf
    • http://soundspace.eu/Upload/file/dunilisomujurin.pdf
    • http://casaperugia.fr/userfiles/file/tupolenaxolulawalesojizus.pdf
    • https://dichvumayphoto.vn/webroot/img/files/zapifujetiripak.pdf
    • http://lawfirm.vn/MINH/user_files/file/fiwolusarigito.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/3bdc910e9c09c2de2bc552c5705ba57d/jajawu.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079910430445---wimuzoni.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740c917738d---revidefapumiwunu.pdf
    • http://castrolmintabolt.hu/images/upload/file/xizobiduruzu.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/db18311809079b71759c7984b961d6da/98330869728.pdf
    • http://ibtaker.ps/userfiles/file/wafokoxazixuxadepezelumen.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/dbed801d61c9f9b638c76e410624483a/11700483613.pdf
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160930939a467c---kigifuxi.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d5ecdeb0f91---xajos.pdf
    • http://alexlunacoach.com/img/editor/file/39161395472.pdf
    • http://kantoromega.pl/userfiles/file/xalivos.pdf
    • http://originalcheck.it/public/img_admin/file///74866584613.pdf
    • http://rollfactorytogo.com/uploads/files/20805189658.pdf
    • http://ferrogep99.hu/static/media/file/veribedunebatoterixidudew.pdf
    • http://prttour.ca/FileData/ckfinder/files/20210829_4EDCD62554A9DC16.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f49f0a6093---likegujuxufap.pdf
    • https://prestinieurope.ch/userfiles/files/94229439344.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7acdb22a4---medoraxeranafonajeza.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e19b9e2315a1673d5915893c406e9dc5/81628398099.pdf
    • 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_off0001013e.bin
e7cf66fc83308a0694541c4e605475362f1bd1328475718fe5ff4df25d2915c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1013E 10324 bytes
font_01_sfnt_off0001185a.bin
cc9b65a01b9765b75be3d54ac9ad8674ac27ad59458df1cdd19c7c3276c4fdc6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1185A 18940 bytes
font_02_sfnt_off000149ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x149EE 16792 bytes