Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce60bd5ab7173b0…

MALICIOUS

PDF

93.2 KB Created: 2021-07-28 10:06:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 42c085f890c03eae0768b144b1249ca4 SHA-1: 772e783244daca0ad7a09485b9c2945c40bcb0fb SHA-256: 9ce60bd5ab7173b09766c2a23667becf36b6547e979f4e5ea0fb7a8637f51452
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to various domains, many of which are hosted on compromised CMS platforms or disposable hosting. The presence of external URIs and link farm heuristics suggests the PDF is designed to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/2ed688213f202d1f8e2b8b84034b7ec4/37548534618.pdf In PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160ecb26455dc7---15706829249.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/13415035422.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8ad9b8758ae7be02c59b0bf5d3127b59/50851117469.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/85021386926.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/fonuvik.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/51201704271.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f409546b0c---sapad.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e82be0520---65084953277.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/vefodivomuvuneromad.pdfIn PDF document text
    • http://amsasecretariat.fr/userfiles/file/dariwetebajakekitivi.pdfIn PDF document text
    • http://senseoftourism.dk/userfiles/file/5140933487.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/degovufijorejiseboz.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/94789944338.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/nesovafogeginominoze.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c8aafvfid0pfruqqq0j29m81i4/86645086853.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/toxifowisokemununamokoli.pdfIn PDF document text
    • http://mp-journal.com/media/file/bibonovugolumi.pdfIn PDF document text
    • http://andreaslasnik.com/data/files/33781308873.pdfIn PDF document text
    • http://fedoro.ru/upload/file/gezuviravamamawar.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/tn21bi2g941tubc31jngnei0k7/sutabuluzowasama.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4a4ccf1bd---mijefijepogusenepajewu.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/nofafofije.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2iupl7u6lb1p190ljmea3uo136/sojub.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c28b9f29020---wajugete.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=%D0%BE%D1%82%D0%B2%D0%B5%D1%82%D1%8B+%D0%BD%D0%B0+%D1%82%D0%B5%D1%81%D1%82+%D0%BF%D0%BE+%D0%B8%D1%81%D1%82%D0%BE%D1%80%D0%B8%D0%B8+7+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D1%81%D0%BC%D1%83%D1%82%D0%B0PDF 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_off0000fd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 10820 bytes
SHA-256: aaff4883f0715c3fcb0bcf162993f9cb55f986afe982224eff628a274e68046e
font_01_sfnt_off00011605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 21208 bytes
SHA-256: 83bc33557abccfb4dddc10aa23505eeaac0f8ec72cda20f255b8a44a33947e2a
font_02_sfnt_off00014af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1