Malicious PDF — malware analysis report

Static analysis result for SHA-256 369d5f64dfe4786a…

MALICIOUS

PDF

64.0 KB Created: 2021-04-29 07:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50435831b2f73659585748ad68302dca SHA-1: 966661d7a7bc74cbe28dbb1d1fab3ecf77e09943 SHA-256: 369d5f64dfe4786a440b9ff25dfebb3c0cb13c2ed1af09ccc068b208015a81c2
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites hosted on compromised CMS uploads and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8461

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://taxiporec.top/wp-content/plugins/super-forms/uploads/php/files/0643ivkh6lqkvfrrdehqnq48cn/xilimogijigoxukuvugexuk.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qg47fg5lg31ebr2fhbq7eoia40/59267394122.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/35a30ed5a1d6d85d4966afaabd8d7bc9/94546225041.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607d59f8da12c---54508635664.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/c302b9a9f0a49fcb3fbfb315022ca7d5/livekavelirepizevukub.pdf
    • http://learningkey.org/userfiles/25086501428.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb0b21c72---34275972129.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/093ba5cd4dd12ac2315d5b21163fb125/47278145402.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1966ca9e9---62944522488.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/p817pfbs2r2idebjn7lrqgejp0/50637394840.pdf
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/83edc350a923b1d587dc900789ef8ecd/54212597655.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084405f29beb---lisukegevuxuduje.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607843b1372cb---86794514260.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812b6164d14---zagazowej.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5e535f095c8f3eaf454b3d86e56763e8/riripalawalewaxidudufetob.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+horror+of+the+heights+pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9dd.bin
dc1a08050736954fb851f1f37fc86fb10b9fd88503a27642841a16c10bdafe84		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DD 5008 bytes

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