Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce5570b0ad91416…

MALICIOUS

PDF

90.7 KB Created: 2021-06-27 07:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 564e65ab1e34dc2ffb695ac813c3234c SHA-1: dbc064276fee70326a8cb9ba4298fc2f7fe57178 SHA-256: cce5570b0ad91416a1719cc7a01f0f2211e5dc716318afc64c0cf132164af948
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'SE_URGENCY_LURE' suggest the document is designed to trick the user into clicking a link, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://irlanc.ru/uplcv?utm_term=game+show+quiz+questions+and+answers PDF link annotation
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/bfa68d9fe3c64894a8e22eb5d59287ae/27799586783.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/25494389198.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/f0170ufs3p1ol9ivt18kfb2fb6/51181538297.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cfba60baaeb---fatovilonizozedebi.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/ratujawezaganavikebipat.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/17ojto7k8qpihivvtn777nqn7h/75354623180.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/93cbbb0ee3a60421105bb82c21fa23ba/71666045799.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732de0dc3f8---75461881353.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/3keusn2qr0istu3k6irht9fp8v/83918205630.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa6d381801---63916306889.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a776d111c08---kadekoga.pdfIn PDF document text
    • http://amdind.com/userfiles/file/tadotuzupimobozurego.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607e2e6a0947f---98120047383.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608549657501d---gavewekotudu.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/7da14e4e337e9a017e53d35d529eea5e/74729189343.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23c6de1f4e---56604063968.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/xetotezeronamu.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/86b5be0bbaa9097cd056b60980010227/27670120640.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/01d8b5210e8de8288b6e4962696181ff/pagopisemupi.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3b7b49ad8f3f7a9d223637e870c738d7/56162621171.pdfIn PDF document text
    • https://citytrafik.nu/images/file/86326175051.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/sedemirubogibepatenum.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/hp8nioncrdlv68cvjehl6svdn0/32919369110.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16085d7a87eca4---rigedalovutuvobef.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11669 10900 bytes
SHA-256: 3db916478028fbf29f04b89126dbc70a736059db392885b6f2c149ee28bd2647
font_02_sfnt_off00012f5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5E 17448 bytes
SHA-256: 6950bdeb3bf9b37bff9a78dadaf7003cfdd6b2b12124236520b688611e0c36e1

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