Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8db3d7762604450…

MALICIOUS

PDF

53.5 KB Created: 2021-08-16 22:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 680da19bebce0eddf11a9826c5a39181 SHA-1: 5576914200e00fb10cc14cc95d26ae87a73b0afd SHA-256: d8db3d7762604450ec4f9a019a958880b61a8d5900efdf5acdd240094259b1f5
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution campaign. The presence of multiple links on disposable hosting and compromised CMS upload storage indicates a deliberate effort to obscure the final destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

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 https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/8c578a997d0f145c247f45c5accde8df/18384062805.pdf In PDF document text
    • https://afayl.com/userfiles/file/safuvab.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/zitunuw.pdfIn PDF document text
    • https://anfauglir.com/images/file/16144544724.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/0158144b288080538694b0b1423be6fa/33935891122.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088b1828407c---90849879576.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2fa48da5d---27934290390.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/f1546ad317c832f6c9bd86efeffa2ed1/41001325936.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/gfdet76qhpb5jukd4imi6mh787/minilalagogibazofutas.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16075959ba71ff---zabemapasidagunolupipu.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/6194934260.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210715_EA5BE1FC208BFB3A.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd78f82ac2---64611004980.pdfIn PDF document text
    • http://hrudolf.com/userfiles/29400337914.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210716_A195469942618422.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/saduxofiselewonukufolapu.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c9873b6cbdde1ac735f7015f8962e3d4/kukov.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/vobepokeporuturajina.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a850213009---17402938690.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/41891317809.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/17320393606.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c528c1541---paxevapizuwanedibolove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=antenna+design+and+visualization+using+matlab+pdfPDF link annotation

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