Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa2dd735ffdff64d…

MALICIOUS

PDF

47.0 KB Created: 2021-06-27 04:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c25b5dc96fa764a3b4667e58e5128fe9 SHA-1: 348178c13e6b9bac9bb6a966e2ec0e059bdfc1c6 SHA-256: fa2dd735ffdff64d66dfe407e40cdbd73f7966212b923be6812196dd53cfbd70
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary attack pattern involves luring users through these links, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8587

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://krisoc.ru/uplcv?utm_term=russian+quotation+marks PDF link annotation
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/edjbkeks4f3ojbhj74a21v8pu6/daritofevagoxezazar.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/27578054662.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/70901696256.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/8d2b2d40f2eee29df3c8023d4d34d49f/7110331588.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860e7f65c8f---tuxofazedosokin.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/fekifugiroruvagu.pdfIn PDF document text
    • http://bafiti.com/sklep/userfiles/file/bumirijadelud.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/af9b632f4919a6e74f89ecf57d59f09b/22986301740.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/28603655678.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/tamuna.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ae6cbb965---fedizowutiwefubatejedoj.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/nigenibirisesimomi.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/15382780182.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/bifutipet.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cfafa8ab0---kuzimexaliziruzoroles.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/7c51032cf9cc25e8c67add57081622f5/25902474216.pdfIn PDF document text
    • http://starlightcelebrates.ca/clients/4/43/43e9139217482d7666ce300faf566241/File/mixigugovejoki.pdfIn PDF document text
    • http://erfaspot.com/resimler/files/29238402477.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/lerutazapuvumupati.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba5718164a---77659776112.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/jujiwejajirop.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dc33c2145---pesujoki.pdfIn PDF document text
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/xukisin.pdfIn PDF document text

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