Malicious PDF — malware analysis report

Static analysis result for SHA-256 fef2f071d5e95431…

MALICIOUS

PDF

58.2 KB Created: 2021-09-08 06:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 63476bf73f7b8df13786c0c9ceb68767 SHA-1: 4308247c53d8e95eaa66bc7d1b83ed1243eea8f3 SHA-256: fef2f071d5e954318710e5e600ba6c2b1226712d99e29ac0dc1755e666b28d43
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to various compromised CMS upload directories, suggesting it is designed to lure users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. The sample's primary function appears to be acting as a link farm to distribute further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5978

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://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b097a1c38c---8315231280.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/trvn6f1tvl72fnt7g5q86cnqj2/wumidawesosezuwinatinev.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/t0ktr2fgum4pm0683lv4dg8s86/rusowal.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/faxefi.pdfIn PDF document text
    • http://meijialx.com/ckfinder/userfiles/files/fisav.pdfIn PDF document text
    • https://pathakpharma.in/singhania/downloads/file/45918715973.pdfIn PDF document text
    • https://hansenlight.com/UploadFile/files/wokonus.pdfIn PDF document text
    • https://mytopics.it/uploads/file/gisezapenozugofekofunodi.pdfIn PDF document text
    • http://graham1978.com/clients/79565/File/kumoloximokidosasim.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/budikiza.pdfIn PDF document text
    • http://simonide.org/userfiles/file/juwesaledosidako.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/98035022456.pdfIn PDF document text
    • https://jiu-hang.com/upfiles/editor/files/27830575007.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/8de9f9001b5801a34a5b44a9954d6e2c/viwemuvugudiratul.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca49dbbb73---xaxixofafawevenex.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/tidubikipawiva.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/ab69db145c3b77d3883749cb4cd862a8/jupagedasobatabal.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/1861893279.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/mrd49doc3ek2apu49vm2od74v0/36529756327.pdfIn PDF document text
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/cb1a6011bd6128e7aadafccb1867f0ec/dajeboxutub.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-3/20210503084836341019.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/d07dc60380b8bb6b88762874489edbfa/turuxubit.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d468a58746d---bofigokimokepogezediwos.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/gagadulasudiluvaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=edward+rutherfurd+paris+pdfPDF link annotation

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