Malicious PDF — malware analysis report

Static analysis result for SHA-256 47dfd0d9e4583c01…

MALICIOUS

PDF

59.5 KB Created: 2021-09-05 08:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9934de73baa3f6220a5eef5eb0b962e0 SHA-1: 2e7c8e3e5a4125f920fb413231892a8a0194dc48 SHA-256: 47dfd0d9e4583c010aa85ffaf5be4c51f539dabde06a02dc6b898ffba5dbcb90
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites for phishing or malware distribution. The document body is unreadable, but the heuristic firings and URL analysis are sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6721

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 http://bluestandard.pl/ckfinder/userfiles/files/tiwuzik.pdf In PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/lg5bihkv14g0b1hd1r5gbttsn1/sowojodofenaboxebi.pdfIn PDF document text
    • https://muachungbaohiem.com/uploads/userfiles/file/68372541875.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/2470341507.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/vituwovinof.pdfIn PDF document text
    • https://seikai.jp/free_images/files/nawojulaxivug.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/molepesunevovepivavaguv.pdfIn PDF document text
    • https://airshow-bg.com/file/41908443942.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/94849938199.pdfIn PDF document text
    • https://galerieportelouise.be/userfiles/files/zaduwopijeradej.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1627265652574965823.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-24/20210624031032845575.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/muxikokoduwufipufid.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/282dfb477ff5d32a28540555feb8dcd2/ripuzutilufuxama.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608280cba7740---tijegilenu.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/dazavejevalirun.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0da1b906d3395865182eb34f701e21e5/subujiguf.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b87d5f200---13623752761.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/cef4e0be7fceb51adddb39c8664db609/41991479684.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/5928071275.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/45437360530.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/givodamuguziv.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb7802e569---zavolodo.pdfIn PDF document text
    • https://tonitomov.com/picture/file/82725319425.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=zapier+parse+pdfPDF 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_off0000d9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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