Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad06e225e5f169ba…

MALICIOUS

PDF

109.9 KB Created: 2021-08-13 19:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4210b40667f00eab2986de1088d6a4ed SHA-1: dfb8b315235eead9307972a2fb531b138d6f9347 SHA-256: ad06e225e5f169baeaa0012b461f5751bbc1af0f69af447c2df42e19cf5af7ca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites or hosting further malicious PDFs, indicating a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and numerous external links align with techniques used to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://huntic.ru/uplcv?utm_term=la+fuerza+de+sheccid+pdf+gratis PDF link annotation
    • http://trendymamy.pl/userfiles/file/26723743075.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/seliginevizajapogajotu.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/lejil.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed88884b1f---nogogitagudadexi.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/06ab63cddf5b3c34b5c4c3ba68d15b90/86890596801.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/riwaguxameta.pdfIn PDF document text
    • http://alohatoypoodles.com/clients/1/11/1122824db0f83c9e74cf39311881f217/File/46089428102.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e49f84c132e492c33bd2d708a917db1e/62281246858.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/laximevu.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/0h773mt8k93lae5eg8hm1koli1/33970500195.pdfIn PDF document text
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/d6fcd2adf3fba608ef9ab463923291e6/simukudigopakug.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d97095e05---pebiwikojifof.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/26031982792.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/alrninht6irh9hmllmpbq46kun/43290948556.pdfIn PDF document text
    • http://eternoohydro.com/d/files/segeseridobumusul.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083f25b9eb06---39975438191.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/tbnj1oig8i27jqpmloh98m8dpv/76317245695.pdfIn PDF document text
    • http://phongthuydotho.vn/upload/files/16176214270.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d47d2a19---45791596073.pdfIn PDF document text
    • https://ultralloy.net/upload/files/gaxexetejigibawaliga.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/56385663307.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f6db04a6f---lanugojazefem.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_off00014474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14474 10744 bytes
SHA-256: 3eaa6033d6edb3a9d252ac16cf0ab0eefcf1bf8e0528f4fd55594950d15093ea
font_01_sfnt_off00015d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D1F 19792 bytes
SHA-256: 903ff835770024d335447063295a604c6f37f83ee580ccbb48cb056a14cfa0a0
font_02_sfnt_off00019002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19002 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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