Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a94f37d8d3c1bc4…

MALICIOUS

PDF

44.5 KB Created: 2021-09-04 22:06:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fc64facbacca0f9121d3f64fa44bee45 SHA-1: 122acc0cc44037ac39dc1ae571beff15b7b8535f SHA-256: 3a94f37d8d3c1bc4d1da31266e3280b886ba447c44d676bc4b8a397c49fa87e9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised CMS upload directories, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score support a malicious classification. The file's structure and link distribution suggest it's intended to lure users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7749

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://pincailight.com/zk/UploadFile/file/2021080218522773499.pdf In PDF document text
    • https://trade.inter-ural.ru/ckfinder/userfiles/files/6639746003.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35247484853.pdfIn PDF document text
    • http://medical-1669.com/userfiles/files/jufozep.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/6c43c09b672a8b08744e1dfef6b57553/bufotatipemole.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/loxigo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608097f40078d---44248634111.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a226d4d5559---fiwuw.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16097e42640f26---puxalerobofunoxuger.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611526653ea8e---fiwinetew.pdfIn PDF document text
    • http://studiomanzetti.it/userfiles/files/suxuvafutenikavewezalupa.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/28804106248.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/a9md44ug4s2lah9s60ifg42hl2/33234911449.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/doduga.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/8e664bd3c7eff34184b68cb34138d9e6/35458615575.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/74dc95e32a4441508192aad9cdf7d31e/49485930669.pdfIn PDF document text
    • https://network-italia.com/file/89033598352.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/n3j530dcoi43726gie8djtl466/sipibuto.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b161147d---zidem.pdfIn PDF document text
    • http://stlukesmn.org/clients/17773/File/kilunarufafetusexasem.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/b844b9bc7935975325d8906efbd8487d/lawilurisodawowetef.pdfIn PDF document text
    • http://valeneighbors.com/userimages/wujinepakipowij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=insertar+pdf+en+word+2016PDF link annotation

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