Malicious PDF — malware analysis report

Static analysis result for SHA-256 118f3b97fea47595…

MALICIOUS

PDF

54.5 KB Created: 2021-06-02 14:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bb289517bb42b3f6ab1dfca43d78a023 SHA-1: 2c1fed1042de9d6a91b4e793c26a0549df9d20ac SHA-256: 118f3b97fea47595e00bf6a2c45cbbd1510c2783966749c67646d01efd43e4e1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7284

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
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://coretry.ru/uplcv?utm_term=top+war+battle+game+best+components PDF link annotation
    • https://people11people.gr/uploads/File/lolaweradibig.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608414380c077---bevujepudeledogirofuku.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/d9c973d4ce4dd9a72f57ac22ed818cfa/levagok.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9607f28805d1bd3c52b3d942fe32a3f5/20573182605.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae89fd0794b---91283695177.pdfIn PDF document text
    • http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/pd87dh3lor2s15dbk1k2obd15t/ketax.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/hnchlrqgkqs3ium9svm3rd0ge3/masebuvomitid.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/4a0089d4b544f45b8421c08db5b0d0c3/46846830825.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d22967ef9e1e0b76a6cf67e60e4f4b53/marolivomepizewolasu.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/dhfstbij36fi64v8r26ajmsno7/87594327888.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1607347acbd866---mixujonidumuxake.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e327cee24e---79374873715.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/cmdso3p69lc3no7addj0qc7us4/31621979093.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/43faa7c9c6e8d50228d819b81b0a30fa/91062862605.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/50433364525.pdfIn macro / runtime command snippet
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160853101e7233---41441814813.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/dibixeputisaxaso.pdfIn PDF document text
    • https://atlantheaIn macro / runtime command snippet

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