Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0949ef01b72014…

MALICIOUS

PDF

88.1 KB Created: 2021-07-05 18:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eeb0c1542054d666448011d0fe4ab091 SHA-1: dc63e1ed5971c3741318f800bb92757170b6d165 SHA-256: 7e0949ef01b72014922788ae985bc4c64bf2645b2b20c63d68e7b2ab7fc9dca5
196 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, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic strongly suggests the document is designed to trick users into installing a fake browser extension or update. While no scripts were directly extracted, the presence of numerous URLs pointing to compromised CMS upload directories and disposable hosting suggests a link farm used to distribute malicious content or redirect users to phishing sites. The document body is heavily obfuscated and unreadable, preventing further analysis of its direct content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a5a8e0cc---33176618659.pdf In PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/84bd6b61fa95b62f2c96fc814631287d/nibiwogipatigar.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/90614905782.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd177e38e3---87433555406.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c37fcca47---26016066772.pdfIn PDF document text
    • https://rimsball.com/ckfinder/userfiles/files/16934531077.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/kibaxokego.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/9378287510.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/2mp9aeu3qruq32u3vdpt6r8ob0/84667102721.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/1e81b36525c870b0671d9d9b709aad0c/46117347534.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6b72efa71---fikipeledozanajexiwugiz.pdfIn PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/vuzale.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/womusesajatozejugeni.pdfIn PDF document text
    • http://iviltra.lt/images/files/badidemosefabigowixubol.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e23be8d60---bodedasuwar.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7574ded4b---29113536187.pdfIn PDF document text
    • http://arcomproltd.com/userfiles/file/10596519850.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d503c344e---46818078613.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/c34nn8e7rgtmong68ktk9ja91p/zuxiribubobaxosodot.pdfIn PDF document text
    • http://www.tramag.pl/upload/file/72693168059.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/bd4855973065c2da0cc2b0bef5adc686/nevatosaxupala.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8a6612f49---16689856394.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+create+a+level+in+revitPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/d8442a8972a0376732d612c07f423dfb/71846417546.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_off0000f6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE3 17504 bytes
SHA-256: 7f8504bd7a70569f5360ddbf1e56cc14c7a9a21f8e47baad787ffae261758b82
font_02_sfnt_off00013c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C49 10200 bytes
SHA-256: e6f4a19abde6bca89247c942bdaf579f57059b283dedb2645fe14f25cb761377

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