Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2b133d158a21e7…

MALICIOUS

PDF

85.2 KB Created: 2021-06-25 16:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80d89d70f5bc8ebfa977d95c5225202a SHA-1: 01e4d70c7e77efcc47f7605113e7486b53b0720b SHA-256: 2c2b133d158a21e7981c8c95a1ba55fce2de9b17da808456a15d4367e2d3c0fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 http://megat.pl/uploaded/fck_files/file/fimef.pdf
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/2c50bc29a9986ef595a0ca52a4972c3f/xefulafifanetobam.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a192f0354a6---74863992958.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417ae53044---22087935774.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/fpd0oem2c9jgjs65te0efdbn13/jagemiv.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b81fbbafe95---18538487490.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16099311a37254---44935468871.pdf
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/6509c94554072d06a5f0c821b98cebf1/8308835184.pdf
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/a7078679c291b9ff8940ca79e17f1c67/31525594329.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986f272929d---jirevuzo.pdf
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/388ca7cc716564590aa7f879e6ea7e8e/didepebuw.pdf
    • http://archi1919.com/smlclub-files/file/73440046812.pdf
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/d7451f2d24af0dc76fc637a34e0e474c/54852107448.pdf
    • http://kemenyseprosiklos.hu/upload/file/larafojivenasefobofu.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/83ffae33c08f01db62d7f2b108f1bf77/lofitukevamenedubekifo.pdf
    • https://qpshouse.com/upload/image/file/miwifikubozemakesofizig.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=ride+the+high+country+full+movie+online+free
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaaa.bin
15e0b6a2ba495c6e57c9346150f2d444a0b58e333ab5b0de8a1fd1adf2106e1d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 10916 bytes
font_01_sfnt_off00010390.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10390 16792 bytes
font_02_sfnt_off00011ba2.bin
4685fe680481f2a65ea09d590453a3e7c7bcf2998a9781bdaafcb5db942f83bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA2 17092 bytes