Malicious PDF — malware analysis report

Static analysis result for SHA-256 6119682612b4e1d0…

MALICIOUS

PDF

72.1 KB Created: 2021-09-11 16:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: bde336ab4e78cdd86df55f693d5112ba SHA-1: a0517d538f0e3bffc756a3bc3351e96abd1d89c5 SHA-256: 6119682612b4e1d073890c90f2d8b2fa55afa5e1728d30711b8a4676ae328e4e
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. It functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be compromised WordPress sites. The presence of multiple external URIs and link farm heuristics indicates an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4750

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://drafthe.ru/uplcv?utm_term=classic+nes+the+legend+of+zelda+gba+rom PDF link annotation
    • https://bushregenerators.biz/userfiles/files/93652474833.pdfIn PDF document text
    • http://packamate.com/userfiles/52805868109.pdfIn PDF document text
    • http://xn--22cjbbm2eyae3ehabdb4kqdtae3dxnnc1fhf.com/user_img/files/10774510570.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/sawidomokelopugarenofibi.pdfIn PDF document text
    • http://intertravel.hu/_user/file/lidabus.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/bubawogojiroma.pdfIn PDF document text
    • http://www.keizerco.nl/userFiles/file/3100505901.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/vewov.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/161373a0d45841---sigabemuz.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/77551795674.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/af68b8655cc81c3850e0e739a758faef/46401647033.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/zukejixogavilora.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/mowemirofakulorevad.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/2b69f6cfe605f0116f0082211857c0ea/noduxezaneporevifepexoja.pdfIn PDF document text
    • https://cosmopolitanhotel.eu/uploads/wysiwyg/files/xaxenefemidezotimav.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/kegizapujewapelawa.pdfIn PDF document text
    • http://maybomnuocdanang.com/uploads/image/files/75923072364.pdfIn PDF document text
    • https://kopari.hu/files/file/pupod.pdfIn PDF document text
    • https://www.truck-transport.com/ckfinder/userfiles/files/tuwubam.pdfIn PDF document text
    • http://punaide.com/userfiles/files/sinefesulefotuj.pdfIn PDF document text
    • https://hotararicedo.ro/files/files/23067439863.pdfIn PDF document text
    • http://iltorg.ru/upload/file/xerojibum.pdfIn PDF document text
    • http://bjyhyy.cn/filespath/files/20210907155354.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_off0000c7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BD 18720 bytes
SHA-256: e0ca74bebee2981efdef7dd09095fe74d30ab6719f3a3cd18d7f3d8661a034b6
font_01_sfnt_off0000f814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF814 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1