Malicious PDF — malware analysis report

Static analysis result for SHA-256 f669c21a4dce3aad…

MALICIOUS

PDF

41.5 KB Created: 2021-09-09 02:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 62d8c125509cbc0254b83acc275d5de1 SHA-1: b7e82173b6793ef7b455447d10b4100013b24504 SHA-256: f669c21a4dce3aadf653d61eb1448a0b3b248217ba5ce653741fcede869a5264
174 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Multiple heuristics indicate it's a link farm hosted on potentially compromised or disposable domains, designed to redirect users to malicious content. ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7868

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://thebillionbottom.com/business_school/uploads/file/vomepeberukidu.pdf In PDF document text
    • http://fabriziocar.it/userfiles/files/1780228856.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/lazagefojejojerobafonij.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/o28sou2dbi8ue787tmpim1j6d9/48532872051.pdfIn PDF document text
    • https://interior-mark.com/ckfinder/userfiles/files/71550718576.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139306976aa6---binosofe.pdfIn PDF document text
    • http://thenikharvconsultancy.com/userfiles/file/91997990872.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/21774207180.pdfIn PDF document text
    • http://dailygameresult.com/editor/UserFiles2/files/samoxawedosa.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/kobazivowa.pdfIn PDF document text
    • https://profipreklady.cz/www/ckfinder/userfiles/files/momesub.pdfIn PDF document text
    • http://zopos.zohukum.com/ckfinder/userfiles/files/fuzere.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/23263388598.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/9096286819.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/gimiligasinagubebomane.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/xegedadalukipitujidif.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/wopitamedojipi.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed92f37a1d---11842104955.pdfIn PDF document text
    • https://bankubezpieczen.pl/userfiles/file/61013821487.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613933ee2b5cc---434197963.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/ninepokasadoleweruxika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=android+api+level+market+sharePDF link annotation

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