Malicious PDF — malware analysis report

Static analysis result for SHA-256 048b69aa7c339031…

MALICIOUS

PDF

319.8 KB Created: 2021-05-27 18:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5aef5778f6c4f44af635fb590e982da4 SHA-1: 16dcbf157aa3477a9510d039383963ee7f21c8ba SHA-256: 048b69aa7c339031b72eb8db27f3c926b995bbf2baadcf6a461d80e5f936e0c8
124 Risk Score

Malware Insights

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

The PDF contains multiple links pointing to compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a likely attempt to redirect the user to a malicious second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9217

Heuristics 4

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=how+to+activate+laser+x+guns
    • https://agentcctv.com/userfiles/file/dopevezijoxejoxixezak.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/3127c2e8253be35d98bef5144b808a75/gukalezaxejejavakiluwifaw.pdf
    • http://dzbnf.com/upload/file/%5C/dawanoxijilu.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afc721537f---punudavasikeketababeme.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094a72b4db52---44354565055.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099b40da91a0---sukevimewonis.pdf
    • http://albatrossmrn.com/konadnew/userfiles/file/52162779955.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160729b855e7a2---26414625133.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fd20d9c4c---16918241699.pdf
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/160784be526aab---21622040350.pdf
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9d456435---47818197336.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818ecd4dab5---57201741173.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607596c61f750---41495044600.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fb1939fae112664b8a2776b2bb845c28/40374837264.pdf
    • http://podiummoda.ru/userfiles/file/xokiwakufozigejowu.pdf
    • http://aliglobshop.com/userfiles/file/10366373311.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/bf380bdbde46f6079fffd5fc7b026666/10358912222.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003ef5b.bin
ee66ad1378a177423596723ff51a9538040b71a6809fa1d225dbb0c74d797bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3EF5B 77844 bytes
font_01_sfnt_off0004d5d4.bin
176ea200511898cb61fd69e40575cc9992ae3b0e2c12559e1327fdc26dc0a2e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5D4 5148 bytes

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