Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9b45c6e2543dc27…

MALICIOUS

PDF

47.4 KB Created: 2021-05-24 23:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a4fba1ed805524fbe8fd79c72929e57f SHA-1: 7b38b570a6ec46a5d86da83508b452f4f843acee SHA-256: b9b45c6e2543dc2770d29824b1194720d5148327283f72a52ce9603dc8c5ff98
154 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous embedded URLs that point to external websites. These external sites are likely used to host phishing content or distribute further malware, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7248

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://smidgel.ru/uplcv?utm_term=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D0%25BC%25D0%25BE%25D0%25B4+%25D1%2581%25D1%2582%25D0%25B0%25D0%25BB%25D0%25BA%25D0%25B5%25D1%2580+%25D0%25B7%25D0%25BE%25D0%25B2+%25D0%25BF%25D1%2580%25D0%25B8%25D0%25BF%25D1%258F%25D1%2582%25D0%25B8+%25D0%25BF%25D0%25BE%25D0%25B2%25D0%25B5%25D0%25BB%25D0%25B8%25D1%2582%25D0%25B5%25D0%25BB%25D1%258C+%25D0%25B7%25D0%25BE%25D0%25BD%25D1%258B PDF link annotation
    • http://amphorabeautyclub.com/campannas/file/76336702432.pdfIn PDF document text
    • https://moto-trend.cz/public/files/fck/file/54626748827.pdfIn PDF document text
    • http://cartopack.com/Images/file/84786053774.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed70118206---74270196812.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870b666f3c9---mevisas.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf738115d2---loforulepivumixu.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/86b9fda75eefa6eda87377ad14a91c2d/pixomekukoxasufejuxixube.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1608cabf3316fb---22830640794.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/b252a1fe06e049f7a25b3696a950acf8/wizopokokufiwab.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/ff17a06b2d615aa2c8342558de58a451/37241763033.pdfIn PDF document text
    • http://animalscipublisher.com/files/upfiles/file/42025851092.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/u3krs1rso7qmpmo0afn9fq2ud4/89438970066.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609843cb1de6c---52852279553.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/143d476f85ab92b24aa9cfcd60a413d0/27979993583.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829df8082d0---xefevewakik.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbb4c1b94c---98698898265.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/sn7svavtm21098971g7ku6l2q0/fubelifolop.pdfIn PDF document text

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