Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf837cf6fd1ca5f6…

MALICIOUS

PDF

61.2 KB Created: 2021-08-20 22:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d928558982381560617a8f14e9a1ead SHA-1: 97ba38a412effe4985b63a230722a42f1294f38a SHA-256: cf837cf6fd1ca5f67f39e3e9bd5f3f3bae233a29fb26dd46a59f5822ab22b959
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially harmful websites. The presence of an embedded JavaScript stream further supports the possibility of malicious code execution within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8029

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 https://smidgel.ru/uplcv?utm_term=what+is+the+highest+score+on+drift+boss+2021 PDF link annotation
    • http://stalmont.eu/userfiles/file/xaniz.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/diwediwurev.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/46809757271.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b46c88c4ca2---68563701771.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c97d280a683---93989544035.pdfIn PDF document text
    • http://diamantina-joaillerie.com/ckfinder/userfiles/files/wuvilajifezubog.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/18781550959.pdfIn PDF document text
    • https://hotelexpert.ro/uploads/files/99920884829.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f684aebb58b17dae90eb538fd7e06fb4/51673518214.pdfIn PDF document text
    • http://ypdtools.com/ckfinder/images_store/files/xumowigumubos.pdfIn PDF document text
    • http://ithalattagarantibelgesi.com/resimlerfiles/64565028167.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/61241514674.pdfIn PDF document text
    • https://nhachoxebus.com/upload/fck/file/837392752.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gapofawuzevobidaw.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/712072584b03674d351bdebc673b4048/9972029839.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/nrns0k6oouvh2evr15thl3td90/nutanoruveziwisijozanaras.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/33261561618.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/561112960609c8db3407b4.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744f97be433---bawopujavujo.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/39bb210ac76559b1d39d5c69a8f11e89/36430904673.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f79b169e07a---xomupupufodakuvetasajen.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/3662680780.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/655d30f5e3b83702413aea30746277a1/64756589277.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/b75c12bb771e22ac7ff95769837e40c2/77291119239.pdfIn PDF document text
    • https://bednidhitraders.com/userfiles/file/52631621341.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f60df8799a2---10737993715.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.