Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f1338bae364237…

MALICIOUS

PDF

117.5 KB Created: 2021-06-11 07:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4f1b9828b0299f436e4fb3eca4165b40 SHA-1: 2aef9c761ac3d83cc5a3aec408fea0658e30232b SHA-256: 24f1338bae364237ab023afa8c87f9aab13a2ea85995e75fa0c660533c13a7a1
154 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classifier flagging indicates malicious intent, likely to distribute malware or phishing content. The document body, though heavily corrupted, contains text related to game ROM downloads, indicating a lure to attract users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8896

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://cructi.ru/uplcv?utm_term=crash+bandicoot+n64+rom+download PDF link annotation
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609890f6d4c0e---71760526682.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nao7u565il6mib2b9tk0rgk4pg/nalixazewizalajok.pdfIn PDF document text
    • https://paron-rebondir.com/uploads/files/81811085761.pdfIn PDF document text
    • http://sxhk365.com/uploads/file/%5C/runisugozapotexexo.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acf2a269160---nenakanajomebix.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce52be9ca8---joriwabewomuxesunome.pdfIn PDF document text
    • https://fotoprint.lv/downloads/file/telesi.pdfIn PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/a4kq250gdfaeuke4s1n1n51qjo/timasuja.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/07b1510c71f61a2c8ddc26826d29480f/potid.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/16c34769b32f7e4bc14edba0e9dce116/newuwu.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a188731e4dc---mapatigiriru.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aafc86a3715---57378189026.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/52bb7fddfc69775b1791319ae87af7b4/58646955603.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/6487024791.pdfIn PDF document text
    • http://etcad.net/np/upfile/file/rutuzizakuwaza.pdfIn PDF document text
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/59193684712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18A89 5420 bytes
SHA-256: 446952745a14ae95f943994f52c67c7ba89119b1f99bec51c55ea546871c34a8
font_01_sfnt_off00019d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D42 5556 bytes
SHA-256: 0d60fd58158152ddab908e0fddd3097b92835aeeecceb03be7a9b09c55ee841a
font_02_sfnt_off0001b00c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B00C 12728 bytes
SHA-256: 51dd2473c41334effb1190f1133dafe0da04efb022962eb792ca36c3985d20b2

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