Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3ec742e9ccbfcb…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 12:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8e6770272714938638ed3b080cec6e7b SHA-1: 8354c15261da8d28dbb2aef8d4e0b61c0022e9f0 SHA-256: 4f3ec742e9ccbfcb03a48c0d761d8fcd8cb81f87288321447507cc6917df4a98
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or to download further malware. ClamAV detection as Pdf.Phishing.Trojan further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5369

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
  • 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://chcial.ru/uplcv?utm_term=sequences+and+series+review+worksheet PDF link annotation
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/cc147cdad1a03ee5f6f5f32c70e8b064/tadebiwapulezab.pdfIn PDF document text
    • http://lyzjkgm.com/d/files/xumujojorijonexonix.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088df4212eba---taxomini.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607426d128f64---49070469072.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/doxiberobamapajadu.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911a4a17ed7---17595394400.pdfIn PDF document text
    • https://okinawa4d.com/contents//files/47146317669.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/pepesipajujut.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/kenatokusawoxuraxak.pdfIn PDF document text
    • http://jimigubellifoundation.org/clients/f/f9/f96c94eea877db95ad0a8b6fd709b1ed/File/birisajojuxativemifi.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/451748f691f8a0cb3f9a58665631bd54/39611602051.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/suliwirezinubotari.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf3db90548---dukopalalipufago.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/024851dbbd388798eaf7601c35d221ec/mipavavumiwewesibikupid.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/laruruxufugomiribiru.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/610f48082fa5b8e286e6de99fa994db7/73053622276.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/buwovijedinokemosikal.pdfIn PDF document text
    • https://aykutemlak.com/upload/ckfinder/files/mijosa.pdfIn PDF document text
    • http://bluekeydigital.com/images/pic/file/mazirijunof.pdfIn PDF document text
    • http://5m-tti.com/uploads/image/files/lawikorofunejuzelonabakuz.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/basopota.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/39687d05cdc11468aa563acc99a878f1/zakaxuladapaz.pdfIn PDF document text
    • http://atek-ent.com/upload/file/fozatogabawerukonuxisun.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/3035592cde9886cb391aa5abb8ac910d/lumijejegovijavalud.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610bf2ecc906b.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/15794280295.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_off0000bb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB52 15816 bytes
SHA-256: b58ba8558b892025a435d4cabce86b0e501e3c26d528fd929fcce362eb32d2a6
font_01_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 10984 bytes
SHA-256: 577426eb305c7f4b85a781a15b4f6a7154dbae26e392ee27708ce26d7bf7cc34