Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ccd37dc96b7c76d…

MALICIOUS

PDF

82.2 KB Created: 2021-09-06 07:53:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf7e7332a83dc7233b1e00004367079f SHA-1: 6cb424a4052edc9489fde64d669a17fbc859f72f SHA-256: 2ccd37dc96b7c76d061dc6602c1a17ffd8479dc735d3c083da7860da54730235
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of external URIs and links to potentially compromised CMS uploads indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/rgma65da4d0kc79qr06dta4hdb/83781297729.pdf In PDF document text
    • http://ozona.pt/wysiwygfiles/file/88990155827.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ecfcee59---1186518480.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/32c3cbd8d272fae71ace9bfe46e3f9fa/91215996684.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1aef966f4---34914008643.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/mifetewedogumerogujezu.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/13817643462.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/8j6c8kt1q2r8thgi77m2600re0/darenebus.pdfIn PDF document text
    • http://thepducphat.com/upload/files/jakobuwemil.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/424896c197d724889eaca2e3c4c2b9f5/29643939920.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/82636889927.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/poregutaxeb.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/xafitedizemepel.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1610e08d4085e7---gotogedekogexe.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/15927178974.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cde072be9b---51881285967.pdfIn PDF document text
    • http://fourfoods.com/images/files/28579017342.pdfIn PDF document text
    • http://askort.pl/Upload/file/30386188880.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16118a3f6a63d5---texuvekaso.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/gutawizi.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/8033dfb739123341b1e0550090786dff/robusokagabokubefuxeg.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/177a8a184ccbda7f54effd10f813b403/dojaginipetudubos.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/3304218606.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/c54215514b01a3a6e42d85abffae2166/guvujunigeziletoboza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=side+effects+of+diuretics+pdfPDF 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_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 17628 bytes
SHA-256: 3af10ead4e6f32191a69a39ff6908bfa4b8dc764a71437ad1f8baded5a5513bf
font_01_sfnt_off00010b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12328 10476 bytes
SHA-256: 6ebe06144a618de0589f28fb8918d114ac5d0644bf9e6d093c1b7ceacafe3112

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