Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffcd078631ced5a2…

MALICIOUS

PDF

80.7 KB Created: 2021-09-05 18:34:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 34c12cd5dff974d6555db420f7947f0f SHA-1: 89bfe955c57fc7261126ad06651a3179aa3de22a SHA-256: ffcd078631ced5a2cc369e2e2a554cfd301c3b1c730c66e283c7add555584689
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • 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.
  • 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.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/73cadf576cd8fe36b5c867732e557e62/96556073901.pdf In PDF document text
    • http://itkaufmann.com/images/fckimages/file/giginojitibuguzoso.pdfIn PDF document text
    • http://ruresept.ru/files/file/28019467620.pdfIn PDF document text
    • http://designklasse.de/ckfinder/userfiles/files/domerebugijabinixev.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a85eed35682---59277158133.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/34570639535.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/retolodane.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607946f663967---63331331272.pdfIn PDF document text
    • http://uticahighclassof78.com/clients/8/89/89c70e22fe5ad1405280b455f64975d7/File/digaladonadofefajo.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160787fb027198---24351155637.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/6fb8192655422f255cba6bdc12a4fce4/66888650980.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/494c10d11105ab193b2d54187384f413/26989497682.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee777dc799b---49545346119.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/b48472289c1d3fcca2e18b4e95053e98/5144295813.pdfIn PDF document text
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef390f0d35---metevitetanaregitenu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/fb704aa745a5ad885405371267ab65e9/16372430997.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/pajumarorus.pdfIn PDF document text
    • http://sattamatkapatti.com/userfiles/file/xugefutar.pdfIn PDF document text
    • http://xn----7sbabjkhbzbqti4a3apfmdd2s4b.xn--p1ai/ckfinder/userfiles/files/wifefajaboneruguzom.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/89103268265.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/uq8m40e9q2l2e4ou7gi3e3plgh/wetoxipole.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ov7uq6r6ml273jg01014etvfq4/8552299873.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=nikon+d3100+turn+off+flash+manual+modePDF 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_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 11132 bytes
SHA-256: d14c6d6969ddbe3bc98cbaaeb9e5738ad81a663d4b24874cc7fc66b21b34064e
font_01_sfnt_off0000f184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF184 17016 bytes
SHA-256: bd064af40539afb70c22e636f6ce3f65bd47d57691edffaf2a6e666297264313
font_02_sfnt_off00011d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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