Malicious PDF — malware analysis report

Static analysis result for SHA-256 95228ed0101b2ef6…

MALICIOUS

PDF

82.5 KB Created: 2021-09-07 06:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: aafd46d3bfa5b4baf31eba4b5b27d01e SHA-1: 0e6f34f3e8c626b12beaa4809da61946686f6e39 SHA-256: 95228ed0101b2ef666a974129677fa96e48bcc2d5354a4b9b9028c0994d691c0
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://cructi.ru/uplcv?utm_term=2014+nissan+murano+crosscabriolet+owners+manual PDF link annotation
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/d26ea3d83ccd3d6ccab80a71b3146485/loremuvobununawade.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c413aca3628---mufud.pdfIn PDF document text
    • http://synphabase.ch/upload/file/xofegudenaletologodax.pdfIn PDF document text
    • http://chongqinghaohong.com/upload/files/garore.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/86486411743.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/lagifo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878a78c6578---99782501961.pdfIn PDF document text
    • https://krantiservice.com/ckfinder/userfiles/files/17271984761.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088e50aabfc6---18685911285.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/661ba8c71e60c049d3f2fc38462fcce1/14480909898.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160994401a9599---39784299956.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/36592713833.pdfIn PDF document text
    • https://mailing.crpm.ch/ck/ckfinder/userfiles/files/21269197220.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beed214a740---46312510360.pdfIn PDF document text
    • https://vsevolozhsk.mebel18.com/uploads/files/61212310120.pdfIn PDF document text
    • https://childconcern.in/trila/userfiles/file/51795680327.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/vuvulud.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d91a77907d---tunuwefub.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085761cf234d---ruvobitujedufobimimikalul.pdfIn PDF document text
    • https://xn--b8qxb801j.tw/upload/files/16829487925.pdfIn PDF document text
    • http://chingyi.tw/userfiles/files/nawiv.pdfIn PDF document text
    • https://altonika.pro/files/fck/file/pixasosizikorotofo.pdfIn PDF document text
    • http://terralindahigh1981.com/clients/866868/File/tesobokesudigisezaluja.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/15351313102.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/61976890392.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_off0000da50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA50 10992 bytes
SHA-256: 4dc1ccf59978df3a4c61cd29ffb58d600252bbb108a1ac43ec9a71ddaf845373
font_01_sfnt_off0000f3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 18760 bytes
SHA-256: 1374a0b2a9f8796c3b2b910af5f6cd1104d709eb88bbb375a1aaec6372b9eb93

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