Malicious PDF — malware analysis report

Static analysis result for SHA-256 3417df7275fd97fb…

MALICIOUS

PDF

67.9 KB Created: 2021-08-16 04:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 0e3c669df086789e611851dd6c7075ee SHA-1: 623332cd6ba23dcd326bede280814e9b2b72d868 SHA-256: 3417df7275fd97fbde4d57b900b6df6ecf2d3a0112033232f9ad2ce337e15f57
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to compromised CMS upload directories, designed to trick the user into downloading a payload. The heuristic 'PDF_REPEATED_PAYLOAD_LINK_LURE' specifically indicates that these invisible links are intended to deliver a payload file, such as the 'wga v0+.9.zip' referenced in one URL. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9850

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/67bfbad6c811b2113e0779f2c566d053/wujujudezasizojekor.pdf In PDF document text
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/63f7bgkkp6c5k5ev20r09i6qos/97159371029.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/tifojiwupetewude.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d158e34a35539f629f6739a5acc7a711/difog.pdfIn PDF document text
    • http://shepardfarm.com/clients/877021/File/24129964075.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/jidixolepixofirurawe.pdfIn PDF document text
    • https://ekransamara.ru/files/zibuzu.pdfIn PDF document text
    • https://printsolutions.ro/uploads/wysiwyg/files/99531619459.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/80864234889.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/liwodino.pdfPDF link annotation
    • https://diaochue.vn/userfiles/file/kozisipabijazinunedure.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b848e453bee---90646177350.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3aba654243---30677161015.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/k1f1l6ujvfqkceslhg9ph06tuh/13930281833.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080828107098---71488899078.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/4997a9c92032ca3dd3e5c0fafa814406/26582054556.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/9307099073.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabca1ade7a---tegodima.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079eb97e673d---49422090788.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dff767ace9---78674272820.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/41332173253.pdfIn PDF document text
    • http://unsersohn.ch/images/file/tesaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=chew-+wga+v0+.9.zipIn PDF document text

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