Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dd89a60dabe6d6…

MALICIOUS

PDF

85.5 KB Created: 2021-09-18 02:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 43e90ea412a49c0136ea30d4b1e4555c SHA-1: 20cd36ed44e86d14c6a3fc49a673470d2bcb248e SHA-256: 62dd89a60dabe6d61d2f216d46b6de7dc0cec0caa4004da706ee0cc440be6e58
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and is flagged as a link farm, suggesting it's part of a larger phishing infrastructure. The 'SE_CALLBACK_LURE' heuristic strongly indicates a callback phishing attempt, where users are prompted to call a number. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with phishing lures designed to trick users into engaging with malicious actors.

Machine Learning

  • Nyx PDF Classifier clean score 0.0591

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 http://alconsprom.ru/ckfinder/userfiles/files/buxesikulusavaxuvinoxudom.pdf In PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/rifolituveworubi.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/64275384464.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f21ae3ced5---81780293524.pdfIn PDF document text
    • https://rumputhijau.com/contents/files/zinovunimopaxiba.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/87185527967.pdfIn PDF document text
    • https://beysukonaklari.com/ckfinder/userfiles/files/kilug.pdfIn PDF document text
    • http://goodtraefarm.com/ckupload/files/64992661026.pdfIn PDF document text
    • https://molecult.metallo-tests.ch/sites/web/upload/files/80063676815.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1630811448.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/papixozeloxabulidi.pdfIn PDF document text
    • https://altaitur.com/ckfinder/userfiles/files/wiwolabekeravo.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/75353795934.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/nizavepifofedefo.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b08691d9e7---71123865423.pdfIn PDF document text
    • http://rigdrilling.org/userfiles/file/56833024702.pdfIn PDF document text
    • https://drisraadentalcenter.com/userfiles/file/gogogolusof.pdfIn PDF document text
    • https://miet.hu/kepek/manew.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/30637628434.pdfIn PDF document text
    • http://pieseclimaauto.com/files/file/takokerowebokimoxawisabal.pdfIn PDF document text
    • https://u15.ch/ckfinder/userfiles/files/61039206534.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/83487969650.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/dadoza.pdfIn PDF document text
    • http://millionsdiscount.com/mo_images/files/fotopunekudep.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/fosavezatodorekuzigare.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=apk+tuck+snack+videoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 1808 bytes
SHA-256: ad2d3b604ae78b7efa31a60c02177b9eadc3554df94ade7820ee80c427c6810c
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 22776 bytes
SHA-256: e21be46564f288bf5c15db7de1d8dfca8c770b6563046a6f23304a577b292109
font_03_sfnt_off000137f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F6 10600 bytes
SHA-256: 9660e55d016b0024cf24b56995eba154a0b54e47f36ec07b1b1bed062e19d25d

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