Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e38214007e2857f…

MALICIOUS

PDF

79.0 KB Created: 2021-06-16 21:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f66cfb621480a9336f2158b2969d9e47 SHA-1: 81cfc0545a1f0ad0d9eb9087e2b1b09363bbe3c6 SHA-256: 3e38214007e2857f3dc799a550014539c91d2b57ad540cee87148193453d2444
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a phishing or malware distribution intent. It functions as a link farm, containing numerous URLs that point to compromised websites and disposable hosting, likely to obscure the ultimate destination or host malicious content. The presence of embedded URLs and the nature of the heuristics suggest it is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6589

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://nomylo.ru/uplcv?utm_term=steezy+grossman+harlem+poop+video
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/88fb7efca97e82062bab142bb211b0c2/diruvibodeke.pdf
    • https://xo-sound.ru/userfiles/file/fefatajatuj.pdf
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/vadrtbk53dhla7jhgk6kj8h6v4/wewugatar.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5e90dfec9---9680534997.pdf
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/r4m6m41qd1555ghkaqdttls6m4/xanoxamegonugonafa.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/6f3bfc4a39ea67fe7e086adbe2372b4c/sofosapawonuzer.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0mouj1dtn0207m6pkv01p87lc6/pawixatezuxevut.pdf
    • http://www.alfapilates.pl/upload/file/32787175831.pdf
    • http://teplolux72.ru/upload/file/68565692209.pdf
    • https://ms01bet.net/contents//files/bisidu.pdf
    • https://dm288.com/slicice/file/77003097326.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8a6a7b00c---nebuled.pdf
    • http://penzionklara.cz/userfiles/file/basekiwerido.pdf
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608d453a0f84f---vapuzofipiteganefakupogez.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7f2.bin
479b7b7fe2ebd53fe61ea8443d5e9e686c83a3549a6e91d980749dfd4c54322f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 5476 bytes
font_01_sfnt_off00010a67.bin
2dab8acb3eb0472b053af883e828a8028d929f53590ef63c090369955ee95368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A67 12660 bytes
font_02_sfnt_off00013256.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13256 4324 bytes

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