Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dae5be3be79a2a5…

MALICIOUS

PDF

65.1 KB Created: 2021-09-23 10:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1b14a0f3ca51b7d3dacc7e8ae61ea47 SHA-1: 983beff096d70db03492ddb2a7f60d70016a57dd SHA-256: 7dae5be3be79a2a5b55a63b8a142330554cb6fb369617c88dbc163ecedc737be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains a link farm pointing to multiple distinct hosts, many of which appear to be compromised CMS upload directories, suggesting a phishing or malware distribution lure. The presence of external URIs and a link farm heuristic strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7267

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://tkhomedeco.com/assets/uploads/ckedit/files/20210905113100.pdf In PDF document text
    • http://cozycornerexpress.com/uploads/files/sejeji.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/dja7ho3f5s6eqph8nkjpu8eu3p/noperixerazuvuxumeju.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/57943330764.pdfIn PDF document text
    • http://www.koeru.eu/failid/file/luraroru.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/lokomevatuzex.pdfIn PDF document text
    • http://decorstore.eu/upload/file/61558140496.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/disewujerine.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/dorukejogirapuvofeminute.pdfIn PDF document text
    • https://k85shj16h-561lt.com/contents/files/vipojuzakejibaden.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/3771428180.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/0bdd9e39940f48cc09888a619b624c88/danowa.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/vapibanuvinimemab.pdfIn PDF document text
    • https://paperland.bg/uploads/file/suxara.pdfIn PDF document text
    • https://domilot.com/uploader/files/99250506376.pdfIn PDF document text
    • http://joelcsimonesq.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/futowowidunonaga.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/fititigozonu.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/pukimexetepemolufajowa.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/lupenisofebesup.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140946a5f262---98883680513.pdfIn PDF document text
    • https://sledovani3.gpshlidac.cz/www/userfiles/files/48361777948.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613acf770e6dd---25730555863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=best+offline+maps+android+2020PDF link annotation

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