Malicious PDF — malware analysis report

Static analysis result for SHA-256 388e6e208c8a26b1…

MALICIOUS

PDF

54.2 KB Created: 2021-06-10 17:34:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49fee5355bcd45a24abdad7aa83cdc5e SHA-1: 58515404e460e191533948387bdb5de30f60b07d SHA-256: 388e6e208c8a26b1061794bce1df81116ae5d2f221582645d496b152fc49e931
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to deliver second-stage payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7108

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://garglob.ru/uplcv?utm_term=justin+love+yourself+mp3
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b410db66353---56499105214.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087ad6c701ea---lonebusavup.pdf
    • https://ceccarbotosani.ro/userfiles/file/rusutiketolavapu.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/c2c9a7d5ee196322ee095f001226addc/nulurokotesoxi.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609604bdc4b1f---40053769298.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3fee2d238---beresupugonenugaz.pdf
    • https://ahreco.com/uploads/news_file/kidajekemaxabenawonaw.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075853f47bd2---7182950478.pdf
    • https://nikosdimos.gr/userfiles/file/turoxo.pdf
    • https://cornwallstaffagency.com/userfiles/file/37149938065.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d63d2478fd54e8c64ba721d67253820f/mubejewabibugajabiwidob.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e4970c9ad---kixebumobotunil.pdf
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607930b291027---vedosovuxapepugojeluru.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/todego.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b8294485382cdb1bc801f2867112bdff/20126279052.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cafbaa2274---78277121970.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/a5a988d7641f706db4aa8bb917908cbe/jujuvariwowigi.pdf
    • https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/3ebf08a85a1c8c7e6ba03e1c7d08faa1/46887443398.pdf

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