Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9d2b7ca2fecc694…

MALICIOUS

PDF

85.7 KB Created: 2021-07-04 12:32:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6e6f37bf91de839b3420dc0f42b36c07 SHA-1: ccfe1c145c2d85f319a3c6f57e1a35adb53948ec SHA-256: b9d2b7ca2fecc6948bbae605f876d2f2f699049266bd8d49df0b2f8f8471652e
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of a 'download button' heuristic further supports the lure-based nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=answers+to+mymaths PDF link annotation
    • http://rasmesafar.net/basefile/basefiles/rogoravimodokumimes.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210603010849.pdfIn PDF document text
    • https://andrejc.si/files/file/wuxokupi.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/81l0v99eg22tjm0vge8um4e23b/sawomuzusekesasube.pdfIn PDF document text
    • http://kotolantopeni.cz/file/7133837576.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/17667367651.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608447e54967f---pidosowutakaguzep.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/sonafubafapafelas.pdfIn PDF document text
    • http://nhs1980alumni.com/clients/878257/File/dezafex.pdfIn PDF document text
    • http://df-foundry.net/d/files/rolikaxulinulewen.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/950210228f309b84fb776046c3f19dd5/8806419915.pdfIn PDF document text
    • http://geologocarmignani.com/userfiles/files/5098298960.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd5e27c6624---99679828178.pdfIn PDF document text
    • http://centurionim.com/userfile/batiment/file/31740537598.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/7032f1a43a29584b621e2f310d1af917/27225512905.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ccaaa7edc4e5d97631bf844f888576f8/86639876813.pdfIn PDF document text
    • http://perfecthospital.org/FCKeditor/file/11296637086.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/63e8617da83eb3065de25f6c066a88ed/noxifafekudono.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16077ea5646ab6---22124354042.pdfIn PDF document text
    • http://crabandclaw.com/uploads/files/33936665761.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000100fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FC 18936 bytes
SHA-256: cb4df05f48c4e23f5c3e6a6cf95335d4f5ec9f5e19be741cc3bd5f107b6e416c
font_02_sfnt_off00013263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13263 10416 bytes
SHA-256: 2bd1860c8e4ce7ad8f9760c920b069088b96fd1e6470a21077954949c9a97bfc

Open this report in the interactive analyzer, or submit your own file for analysis.