Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ebd70c29b68f4a…

MALICIOUS

PDF

88.6 KB Created: 2021-07-31 08:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 03dd5abd69827f6131b5ae60e812a112 SHA-1: e6d3af221267017c8d7a426e10bb2508e80e1f10 SHA-256: c7ebd70c29b68f4ac945509c80c1536df414cabbea8d61dcd760b8b159e355e2
156 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/97752755106.pdf In PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f543324ce5b---48461463007.pdfIn PDF document text
    • https://casabresciani.it/uploads/file/3103260858.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/lotaxisukolixudaraw.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798a6f0d5fa---51851798849.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c613ed5b2e---walotifigusanusabumakot.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/jakidomagom.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/d83575610601b1a7540e5ea96769921c/vixamut.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/28868933484.pdfIn PDF document text
    • https://reitinguok.lt/userfiles/file/waxof.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder//userfiles/files/rozizigasabinut.pdfIn PDF document text
    • http://olgapolyakova.com/files/files/55464931890.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/p7sntg0esu1fa24nlj0g2a3c4a/nisesagalodoviz.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/52ebc4cd9fc0380c9af6b93a4424fc0c/risanotiregukitugamo.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/62359066205.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/f2cbafc1f7f6306b592d96f73a679ef4/tusarumak.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/49393719512.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/ab874985889b14690e6dc7df19c073aa/jipulofefad.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/38a7b227613af2b6a719edec61859ba7/1744678940.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/fazuwudogelovu.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/mejiwejiku.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4t45l101jhs7a37ruhg4ok4ou1/29407729991.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ca37baef2---jademibifavimesovazewu.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095ebab2c0c4---pewamuruvavu.pdfIn PDF document text
    • http://attlas.center/userfiles/file/4023045067.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B3%D1%82%D0%B0+%D0%B2%D0%B0%D0%B9+%D1%81%D0%B8%D1%82%D0%B8+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+%D0%B1%D0%B5%D0%B7+%D0%BF%D1%80%D0%BE%D0%B2%D0%B5%D1%80%D0%BA%D0%B8+%D0%BA%D1%8D%D1%88%D0%B0PDF link annotation
    • 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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 21556 bytes
SHA-256: 7b7cdeb526002cb1e4dea6b0a902ec2e2e881fea46a7ee5d00a70ebf0e6d8653
font_01_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11436 bytes
SHA-256: a2d1d068187c40595d4e1e2d9532aaf3d1064dec59007f8687ed7dd7dd0327d2
font_02_sfnt_off00013822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13822 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1