Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fcc729d958bff8…

MALICIOUS

PDF

90.4 KB Created: 2021-08-14 05:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7c38e5f46fffef8198214d75133938c3 SHA-1: 6bdb018e58b5dea86fd2c0f20d7cf7bcdd0f5cef SHA-256: f2fcc729d958bff87091627c4fe97830869255de0655280904cb5dead49a56cd
164 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate this PDF is malicious. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics and the compromised CMS upload link farm heuristic point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nitdgp.ac.in/uploads/userfiles/files/nevaxifomap.pdf In PDF document text
    • http://shosholoza.de/file/66803455385.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c99ad29c96---46575837573.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/94758522755.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/b053c69bd9d950fc735cba6182f5f1b1/60440672440.pdfIn PDF document text
    • https://lesura.net/userfiles/file/93077194485.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/giweparopavexerasibozo.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/seleranadiraw.pdfIn PDF document text
    • https://badoza.net/userfiles/file/tiwapatadugo.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/lotevonuwitukize.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/40897360966.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b809cad4b---dazifusumajapikizaxavezol.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/bc6a6e92c91885c1b2d616e120433e16/bazefidatomalimu.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abd81515d43---10720585963.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/98222843068.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/81603760320.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609b512faf3fc---23650016763.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/stkb5cq0p3700qv28v6f0k2cc7/sovadolifojedinesirepamo.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074f8ee1be35---dokewawaver.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4405c0857---63303938334.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5d9f49e586792ca7f20a68df6222d7a6/luwitafaruselifigam.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/wedojukepe.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202105/file/46216192149.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/6qlsbg5da6vhi355rjo7fjqmai/98099404466.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3e121adfc---padubexisiwetafa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+install+gta+5+in+2gb+ram+pcPDF 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_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 11056 bytes
SHA-256: 416ab3c7533bfca77e5f9d8563a4c77badaac22d66953cc61300f8a42f2a940e
font_01_sfnt_off00011212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11212 19028 bytes
SHA-256: 2e988e61911000854d1dd44d2f8927806684376a3412bb75f15fcc2e41735da7
font_02_sfnt_off000142e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1