Malicious PDF — malware analysis report

Static analysis result for SHA-256 9774ff0e5523a990…

MALICIOUS

PDF

65.1 KB Created: 2021-06-28 00:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e9466a6f547c8accbc2af248be2e0431 SHA-1: 11c39ba9b3e080e588399bb599099e9b07a568c2 SHA-256: 9774ff0e5523a9903df01fcc2c12f0f42ae827210778f25ef7ca7f9f477d67db
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV also flagged this PDF as malicious, specifically as a phishing trojan. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6960

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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f808ba1506---74884888822.pdf In PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/94cca7729e6fa458cb3d6ef88c3a6b54/7547027347.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff1b331181---kafuxujozu.pdfIn PDF document text
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/e6ofdvr5p12n50u5jt3bgvjf8d/1176986383.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/darok.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/886f85755c317a55c413a31351158176/xedojomaxel.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/dafefukarizigu.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f080f9d5c0---jevudegujesuxu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/15820605920.pdfIn PDF document text
    • http://cecev.com/stockages/files/61656125611.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/mumuviluwudetunutiwuwix.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/29922973332.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/50802608262.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16085fa36ac809---37254625577.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160788bab31483---kibun.pdfIn PDF document text
    • http://laptopplus.be/app/webroot/files/userfiles/files/3101747519.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/81679627250.pdfIn PDF document text
    • http://beergolfers.com./blog/images/file/49937350844.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/m09tq6vq695b44ltlhn71ui6j0/91143298751.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be2110d33b4---80422520811.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160b59f0d8dd19---jozepunuxuz.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a81ced4bd5d---wedodavisidowisakugumeja.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608320874e0d9---doliroromo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=are+days+of+the+week+proper+nounsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 10832 bytes
SHA-256: ff8fe6b0dab42d7d39049c85bf63397b576f2f8b2701733a62597bbfb20aa0a2

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