Malicious PDF — malware analysis report

Static analysis result for SHA-256 d17990188f9258ed…

MALICIOUS

PDF

48.0 KB Created: 2021-08-16 12:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e6bf825ca1d113db8a5a486690c74770 SHA-1: 4675c9cd90115fe831e2e20926a23349f841e6f3 SHA-256: d17990188f9258edfd620af3f3ab326166af64f0341f3373ae646ec00f1d842e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, many of which are hosted on compromised CMS upload storage, suggesting an attempt to obscure the final destination or leverage compromised infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9144

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://garageanything.com/js/upload/files/rijipakufogatupogifatot.pdf In PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1cbd2b2bc---54617555141.pdfIn PDF document text
    • http://huijingweb.com/upload_fck/file/2021-7-23/20210723084358363429.pdfIn PDF document text
    • http://ginzaoakland.com/uploads/files/31179473550.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/41846318968.pdfIn PDF document text
    • http://szsahsh.com/uploads/files/7709791336.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/28514342293.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/ginekoruzewogezajojim.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/kusisex.pdfIn PDF document text
    • http://sjhrz.com/images/upload/File/bamezapadota.pdfIn PDF document text
    • http://vytvarnyobchod.cz/UserFiles/File/buvale.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160a31e0b7f236---siwapizarubusez.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160841291374bf---33989939783.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/govuwajizawegonubovefuki.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b5054340629---bepodotatiraji.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/ac8da552a29146e2ddc66b6599eff34d/67510100546.pdfIn PDF document text
    • http://aimic.com/userfiles/file/61167686078.pdfIn PDF document text
    • https://soudurelauziere.com/upload/editor/file/vanolujufozoxev.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5122b2206de9605c0951fe8241984b09/rejuvonabowuxu.pdfIn PDF document text
    • http://technocom.pl/editor/file/zemivaxejuzuzefeliroxon.pdfIn PDF document text
    • https://bhandarisurgical.com/ckfinder/userfiles/files/xebapisapepolom.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/4036In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=george+w+carey+zodiac+and+the+salts+of+salvation+pdfPDF link annotation

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