Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb5dd377a418e61…

MALICIOUS

PDF

53.1 KB Created: 2021-08-22 02:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: fbbb7e235b253048efd66e49343c6adc SHA-1: dc197d64ea8f0e3aa7fea84ebddced8e63364b15 SHA-256: ccb5dd377a418e615249f3f982792d005232a4e2123693a1b56c4f752da63d19
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, suggesting an attempt to distribute further malicious content or phish users. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8658

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096e10834d15---pofenagagetevameworev.pdf In PDF document text
    • http://apsara.ru/userfiles/file/25781950132.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b855710d7---66586836317.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c8d22813c---mebajarijili.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/53913019882.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/kfo01l6e28483r0ju4jl9l55hn/35736115077.pdfIn PDF document text
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gapiferixupufam.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160be51e64bb2e---zaliwagamupuroj.pdfIn PDF document text
    • http://fmi.lu/userfiles/files/85798724637.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/zokifa.pdfIn PDF document text
    • https://resicolor.com/upload/files/sapewulejud.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/6679394310.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c144e5d748---49114104934.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/takezojixodi.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/2c35a8e72d079dcf1bf74b36438e21f4/28333476472.pdfIn PDF document text
    • http://incoyun.com/calisma2/files/uploads/14781008153.pdfIn PDF document text
    • http://vakaruinzinerija.lt/userfiles/file/fozaje.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/596a9dbae57206e355d7ac5981499d35/mutukurafud.pdfIn PDF document text
    • https://citytrafik.nu/images/file/66359177038.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607be33fcd243---wukipapunewuxozafezole.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/ltu51op02licku06aeqm8toi9g/munireg.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16102b48e3a190---9040811149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=restoro+licence+key+numberPDF link annotation

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