Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9f5e87bb226d7f…

MALICIOUS

PDF

80.0 KB Created: 2021-07-03 13:22:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8aa67351365aa8e7fa48f3b460b76da8 SHA-1: edd9ed6aa2957a9a7ac60a2cae1198514825e7de SHA-256: 0c9f5e87bb226d7fcef29848d1da6b4a7b86d6d1a8065073a9d4a373b8cbb17d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggesting it's designed to redirect users to malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent, likely to distribute further malware or harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6111

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=convert+pdf+to+html+form PDF link annotation
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/55f619894e21db07f307818215813492/43337425787.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e69147356---furegamadoduxal.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/xazugunuxoso.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/fureniz.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c869979a7d---28819020358.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/domajavi.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/f498952ac7f97792964666d1a7221b70/jutoselinoxixek.pdfIn PDF document text
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6657514489---25694115945.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/xefajusagojanojobelum.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca06dae566d---66964352209.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c171b7b9de5---pedupupagovozapekopu.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092459b0e613---30768278994.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/74147868138.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076823ca3757---77441176198.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/famovuredinokuketidogefe.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf6355b73a4---98371062964.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/da741ceb957ffdbb3c72f9f29d0fe85c/pokiwebobolorojosuga.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa307a123a7---velejavowezil.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a715f326606---xowupibabedoxumu.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/dubalinomazuwogagakebuga.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a16aa1cad35---46548535903.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a50a35172d5---65314009211.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c59a6f88e---60320767363.pdfIn PDF document text
    • 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_off00010b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6C 10436 bytes
SHA-256: af9619b48bb0ac5b9883ad6efc0351e646d2fbd11485edb186b749c836d4b98d