Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec917bf6164d76a…

MALICIOUS

PDF

65.7 KB Created: 2021-06-01 06:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e7eb5607da41a8a8a922b5a2f39be64 SHA-1: 6affcc7c799a3f6528f450edf674792a770d049f SHA-256: 0ec917bf6164d76a4569e32d16727f127b6594438eb5fbc0836e7533c76635ba
154 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a phishing and trojan threat. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains text related to "thank you maam gif" and application metadata, likely a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8125

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://drafthe.ru/uplcv?utm_term=thank+you+maam+gif
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/816b434e81a0459ecea9730b85a79e71/dukabiguvajovomufiwazavo.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609e40191a7d4---sebolomakonanazol.pdf
    • https://clifestyle.net/uploades/userfiles/file/29031768124.pdf
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f039c11a5---34182487746.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16096722b452fd---20594795758.pdf
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/nfp11ptct6rq8lphfp4tchbjdu/91419803088.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8ef5834e2---758913358.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7c5abfb02---84878555423.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160847c07dc5a9---belewukisomexiguf.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/tdnu39e70plaj26g13fnep7l1d/fuxagalekeperimurifuw.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608345d524e85---7974001040.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/19c1511394e9887ce9f4243d2bac6802/77344865208.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c8a6e0c4---66913512752.pdf
    • https://diedacorporation.net/freesiafiles/file/87020381958.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ba.bin
f31b6e11ba524137c7b756d5040aa25a7922ef59669f3ef0de81850030ee595d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BA 4988 bytes

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