Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73e8500a0c3c241…

MALICIOUS

PDF

76.2 KB Created: 2021-09-11 16:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d1e0a327e18267b6089996dae89f441d SHA-1: 4a4acca95ad283dcf010ec3455abef5a254e5a9f SHA-256: d73e8500a0c3c24158705f52c124649ab6b53ffe4f7b8171721f2ab441dc2b2c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link farm pointing to multiple disposable hosting domains, a common tactic for phishing or distributing malware. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5631

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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=sonic+mania+download+for+android PDF link annotation
    • https://mkontakt.com/dat/file/39976131321.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/8a5d2254b0460235aa08b91e3d16378d/52121170483.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/14960663486.pdfIn PDF document text
    • http://optimumnieruchomosci.pl/uploads/userfiles/files/81646663702.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/budiraxibuxowoper.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/takubasejunomipeni.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/60144298966.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f16bf41f1---viwigejobudipukajilupe.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86478435829.pdfIn PDF document text
    • http://deborahkay.com/ckfinder/userfiles/files/nujewowivegurevumififukob.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/6422360459.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/dibofamigeralirobiduleda.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/11233077612.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/zilenupelaniratatonifam.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/mamaxakidujofef.pdfIn PDF document text
    • https://flammerouge.ch/userfiles/files/6232383220.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/91901033124.pdfIn PDF document text
    • http://selfmadefilms.nl/userfiles/files/24607602749.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/44466795669.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/5188139280.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613598f92bbd4---65244169946.pdfIn PDF document text
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/73523288812.pdfIn PDF document text
    • https://dallaslandscapedesign.com/media/files/65114045288.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16132e0b45b35e---subopas.pdfIn PDF document text
    • http://thoitranglani.com/upload/files/23794701106.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE990 10400 bytes
SHA-256: 3e3ef29470694150a4ae4de8e5112552a6145478a24f7594031b5bbd99334ff6
font_01_sfnt_off00010118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10118 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1