Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f52bdf0fe5a6562…

MALICIOUS

PDF

63.7 KB Created: 2021-09-24 03:49:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8b64e07d5e35eb7531df2bb6bbc12646 SHA-1: 4d616a2dba5cdc5fecf43cab78254bee64fbff55 SHA-256: 5f52bdf0fe5a6562d9ea085284f77944d14a727e0d88122f3a2f3467db57d98c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ClamAV and an ML classifier. It contains multiple heuristics indicating it functions as a link farm, directing users to various compromised or disposable hosting sites. The embedded URLs, such as http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613519ac44580---poderatugigopobaviwexuta.pdf, are likely intended to host phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6844

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://utcsp2.rustyramone.com/uploads/files/967607033.pdf In PDF document text
    • http://universalthailand.com/images/uploads/ckfinder/files/92112657125.pdfIn PDF document text
    • http://heimundsicherheit.de/userfiles/file/89287905837.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbd97d29d0---zabupemeliret.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/fuwugimivagogeg.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138fc957f65c---wolud.pdfIn PDF document text
    • https://thebillionbottom.com/business_school/uploads/file/visuronirenaze.pdfIn PDF document text
    • https://cvzona.lt/resources/img/files/xabak.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1631387502.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/33863313552.pdfIn PDF document text
    • https://onlinendttraining.net/files/fuvaresidufudajonevut.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/69585182514.pdfIn PDF document text
    • http://ehoron21.mn/uploads/files/ripokakizafuvezafanefubix.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16148190981aca---999781058.pdfIn PDF document text
    • https://olterus.info/contents/files/xixokimegovu.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/papakid.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/rawifamomaduru.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/gobowezokuxamerusinem.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613519ac44580---poderatugigopobaviwexuta.pdfIn PDF document text
    • https://booknowrentalimo.ch/userfiles/files/9923332319.pdfIn PDF document text
    • https://www.multilandtours.com/assets/ckfinder/userfiles/files/zotar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=hire+android+coderPDF link annotation
    • https://easyown.ddproperty.com/datas/files/52820188324.pdfIn PDF document text