Malicious PDF — malware analysis report

Static analysis result for SHA-256 9916312153dfe76b…

MALICIOUS

PDF

62.4 KB Created: 2021-06-09 12:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 641e8cfc060f69700f5fa937bf063646 SHA-1: 8cade1c9a2714760811ee7636b7ad8b4adf89b2f SHA-256: 9916312153dfe76bd99b63feae44f22ca45c02fe551220fbd3ff7d214c4f57c3
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or acting as link farms on disposable hosting. The primary function appears to be directing users to external malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6759

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://coretry.ru/uplcv?utm_term=littlex+ios+13 PDF link annotation
    • http://szentimresiklos.hu/upload/file/46310042802.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080b97bbb508---kuzolajijikasipagekuw.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/mumileferasebapunefumen.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/d4e0b39f3be0b397f6f7876fe71e9653/670116160.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/sukodiwelipeluzosogon.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089d064848f9---lunewowa.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160b8bc227f395---dejojago.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/569fa2805200414e9af2e0b81773eab8/71538179770.pdfIn PDF document text
    • http://theleadershipworks.com/PO2/UPFILE/userfiles/files/96459409886.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160751acd9f7ea---59731404014.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/7isrc8b1dand8ie2uqbg2v6rn7/91872392944.pdfIn PDF document text
    • http://inventory-acepipe.com/images/uploads/files/5794972333.pdfIn PDF document text
    • https://alula.com/wp-content/plugins/super-forms/uploads/php/files/cb91d3e5d47054b0c3496a1552f56db1/19740876259.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1269ecb63a80c8dde914e99772992ed0/77253532211.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210531_438600585B8D2919.pdfIn PDF document text

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