Malicious PDF — malware analysis report

Static analysis result for SHA-256 414e38fe3a996cd2…

MALICIOUS

PDF

74.1 KB Created: 2021-07-24 18:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 107aaef1ea64c705b2a3e3a2be56d649 SHA-1: aa0f9c68718298c33c8dbc7acc12230b4fc3fedb SHA-256: 414e38fe3a996cd26702517050db19943601e70afbfc79d5e937ca4d9b0712a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, suggesting it's designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the nature of the link farm and the PDF format itself often involves JavaScript for redirection or obfuscation, hence the T1059.007 technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7028

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 http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16080c9af9c8ff---25738628432.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf11abc246---5136457948.pdf
    • http://ingenermarket.ru/userfiles/98238357626.pdf
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607319fb1ee30---losilijogikogimobe.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/d7c9f1027091665ee417cab4cf25682d/35952797403.pdf
    • https://samsungklimalar.com/upload/ckfinder/files/34036595493.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836af939893---37343488831.pdf
    • https://dreamscapes.ca/dream_scapes/userfiles/files/80763223975.pdf
    • https://airflow-skateboards.com/userfiles/files/rilugixonesuwi.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee25b097c6---81256268904.pdf
    • https://geniodelweb.com/file/36189472658.pdf
    • http://ritadas.in/userfiles/file/wejexirifetunomezat.pdf
    • http://esejsc.com/upload/files/73007330878.pdf
    • https://abugfreemind.com/userfiles/file/komav.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d98bac52b6a---wexunedemidarorifa.pdf
    • http://szkolka-wiercioch.pl/files/file/41109902597.pdf
    • http://etcad.net/np/upfile/file/37490258670.pdf
    • http://posekatzahradu.cz/files/file/76931130598.pdf
    • http://fundacionecla.org/resources/original/file/migumaxasegarosanepoxak.pdf
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/257807biguqk8l7kpl9tjjir81/simulonedovobamirox.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4153698e4---mulesiwinokizobumos.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3b9d468cc---45718639266.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/7pjckcttmf454p8oeld1isn6tu/mofapewesikapipalijin.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfe05cd61b0---74235541283.pdf
    • http://www.look4job.gr/images/_user_na/file/mizavoreminitiletu.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+do+coliform+bacteria+indicate

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