Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f7ea170100d4c8c…

MALICIOUS

PDF

99.5 KB Created: 2021-08-04 01:31:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7b43c144de378f7fa2cfb3b2a30fa03f SHA-1: 5781e9347e8d47f48a3b928778d9b4b144244811 SHA-256: 2f7ea170100d4c8c42b571de8ae5393775827dfbae01888eab48fbcf12130fb6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, indicating a link farm designed to host or redirect to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/33o30073akrounu9mpnj58r09j/negexazozekigof.pdf In PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870ff211a90---sikatebepivokalosejon.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/sumiwuxubefufujivale.pdfIn PDF document text
    • http://dmkaudit.sk/101/upload/file/sibubegimo.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/95589623247.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f099c266a6---1353557468.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607402f6907a3---muzifixal.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083fd46213c4---47416467026.pdfIn PDF document text
    • https://biocoils.com/img/file/meroxo.pdfIn PDF document text
    • http://hotelpenza58.ru/ckfinder/userfiles/files/28202185781.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/4ng4e4rp4b7lajlsb0kq4sg8k5/suleniwonebesizakuwot.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/16385316477.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/libupubekezojusa.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/miloporitobevopuwagu.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/b3038b79e108fbdda323a4ffbf968c6a/beropupin.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076168a13314---gumiwepekizewipuraxoxazu.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/a51685c2db5e50ba985e91cd06f97012/49491404577.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/tuwazalulifulof.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848b136f008---sigalajopelen.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/sewujilinumiletelafoxipo.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087a8cf42123---jaxopikogexekavuma.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/700c1fc0ce7504268cf6da0fbf528d34/37224437065.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=obras+importantes+de+richard+meierPDF 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_off00011d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D95 10896 bytes
SHA-256: 8ce39114389fd8f9da34bdfe03cf18e317e375b0a0399c0b529078f6f46dd894
font_01_sfnt_off00013662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13662 18824 bytes
SHA-256: 1e95ceb80c2153f14b3f1b860addeb7b2128874d1c3583b2960c4f4fff791520
font_02_sfnt_off000166cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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