Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7206c709b3ab971…

MALICIOUS

PDF

78.1 KB Created: 2021-09-05 00:17:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c127116252f2b38e2a6066596fe8420e SHA-1: f9b58b172a2fe4a8fb55748ac29609a8afc411dd SHA-256: c7206c709b3ab9713139a879b4ab5255acd79b1e43a60b23aa14a8f2c48290dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a large number of external URIs, many pointing to compromised WordPress sites, suggesting it functions as a link farm. The primary attack pattern involves directing users to potentially malicious or phishing content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://drafthe.ru/uplcv?utm_term=pipe+fittings+names+pdf PDF link annotation
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/c06c129c03c9d6084e257e69a6ac33d5/sirokov.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd60303d7e---57586420306.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/82031604622.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fb7f9c250---viwuma.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/6ni1qjutssprc2n2gtl9eke3n0/zaxutuwodiw.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/84e73346fbedbb085c34c20892a18e04/72246118527.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/543d54b065f0474326df86f948aefeb7/94294525557.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efd686a0fb---desigalof.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/u8qtfvpm45qja293ob2trjtn6a/65170789753.pdfIn PDF document text
    • http://palaciodelosnavas.com/userfiles/file/41509126755.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/vezarikavikubozefiw.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e27e534ee8---tubujipixebaraguzu.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/987719a9d1a585f05938a23e6902835a/peforoso.pdfIn PDF document text
    • http://agriturismofattorialucciano.it/ckfinder/userfiles/files/74803545723.pdfIn PDF document text
    • http://fnathservices.com/upload/file/tolulase.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bumexisiz.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b402ab5c1b5---80968824756.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/72533360477.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/xapiriwigevupatenuwige.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/naluvepapupobunapodeb.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b283a0eec9a7f6b763350aef053a5d68/vumimigejijene.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/7bdbcc06fe03d3ac1312173e8718aaa5/galosilogufasegupojepeteb.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_off0000cdac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAC 17948 bytes
SHA-256: 84f2cc3aca41e2897db27516f3015026eee77df19410686f29523d9a3c4f0340
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11352 10576 bytes
SHA-256: 0412242a20b5e0647744e80e0114641252a5445c78ad57987e0daba7a9d372c4

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