Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9708816f5ba5186…

MALICIOUS

PDF

67.1 KB Created: 2021-09-02 18:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 13120ab73397b5929fa46452bd395f3c SHA-1: 3d846fdc64208b9306505d217329bbf3016dd633 SHA-256: d9708816f5ba518630db551abb4a042d733e617cc0a6caa833eff9d97719529f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised CMS uploads and disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the link farm structure itself is the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6093

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 http://aumnat2car.com/ckfinder/core/connector/php/upload/files/sawemijiwet.pdf In PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160d925d77f304---rezodotaroxabogosiragixu.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae579bb0dd---17039990500.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/2420177296.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/72756694710.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/96e86184c8c6aeb96b9ded227fdbe898/45764614391.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ee52a24e1---retegitarixulukonatozu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a833d292b63---somonotamesabebegujan.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084b3e28f95b---7904318015.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/77621512571.pdfIn PDF document text
    • https://securityguardsupply.com/php/uploads/file/31543101407.pdfIn PDF document text
    • http://studioarchterreni.it/userfiles/files/73379434100.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/2872567912.pdfIn PDF document text
    • https://tcremich.lu/files/files/64903975928.pdfIn PDF document text
    • http://chaodontuonglai.vn/uploads/ck_upload/files/wajetepopuvupibow.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/467badng3gopihgtocne92d164/54916738301.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/68842322741.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/7cf1127c5dfb9e2d2a1958f84c816ee0/71040520105.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/defonuzudusabunuteforalim.pdfIn PDF document text
    • http://rivucota.com/upload/files/xelerumex.pdfIn PDF document text
    • http://roycraft.ca/userfiles/file/91707944752.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/92472089983.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113c9572cf11---juzububisaseniterodixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=nikon+d5200+manual+isoPDF link annotation

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