Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e2cd6a3207e63f…

MALICIOUS

PDF

56.7 KB Created: 2021-09-13 17:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 80f96610c2e542f81b0e0aae3cd7dcb7 SHA-1: 8a7582cd6e51862b8509e28683c1c6fbf0230d6e SHA-256: 99e2cd6a3207e63fab5909768341ae7bb7fe8dc03336a2bcc6f39b02dea2b5de
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to websites hosted on compromised Content Management Systems (CMS). This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7557

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 https://pixomot.ru/uplcv?utm_term=rich+dad+poor+dad+pdf+audio PDF link annotation
    • http://spain-ex.com/images/blog/file/zekaxobeduzakisirixeli.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5a045cb7d---56538485825.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/nopavenoxuteworiwafave.pdfIn PDF document text
    • https://glaskunstcentrum.nl/images/file/fapiromemididugodoba.pdfIn PDF document text
    • http://terminsk.by/pics/files/wevajewusubunowote.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/mifibop.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0b9becfb148d15f51ba63cca028c1821/zarabetazovas.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d8881b5484---mezex.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210907_DB9F135A0EB58ACC.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137f07bb5b32---tepugerigexojon.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/tozitabajaxajotafikit.pdfIn PDF document text
    • http://vina2002.com/uploads/files/8002328641.pdfIn PDF document text
    • http://punaide.com/userfiles/files/38864130827.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/538813998612fa89e2640e.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/76852f1e2dd3a70cd83542ebba0530d6/povojiga.pdfIn PDF document text
    • https://rinducm1.com/contents/files/26236746384.pdfIn PDF document text
    • https://turbooto.vn/upload/files/sowuliva.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/xudumazuzebiriveror.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/gufususa.pdfIn PDF document text
    • https://aqua2go.pl/galeria/file/75217902135.pdfIn PDF document text
    • https://doxity.ro/ckfinder/userfiles/files/28565614057.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bemiwomixirawuvabi.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/78540133739.pdfIn PDF document text

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