Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3bbdda7bd4303d…

MALICIOUS

PDF

75.1 KB Created: 2021-09-04 04:21:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fcfe3d2ad0eff72bf70f1be20c03f6d1 SHA-1: 6f1be7094f7ab33f2a7653c83a2feaae824af663 SHA-256: 0d3bbdda7bd4303ded3096cd58eacf5c77fd698d5f28da4742a123aea943d020
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=pueblito+viejo+partitura+guitarra+pdf PDF link annotation
    • http://studioprogettoarchitettura.eu/userfiles/files/1033520277.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/44837053759.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/89308443812.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/69158753902.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609709d7ecece---60799046319.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16071e481e79ff---patunajabu.pdfIn PDF document text
    • https://remoteyourstaff.com/calisma2/files/uploads/32731936992.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/50533485542.pdfIn PDF document text
    • http://dobermanncz.eu/files/90195018824.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29d62a7de---46127809799.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/oe7ds3q0gebri166pos8ek0okd/11782679959.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/c86d02c765051af3a8ecab459ae5b0df/wokojedakabikemulekuzeje.pdfIn PDF document text
    • http://texmet.pl/userimages/file/fonujo.pdfIn PDF document text
    • https://smartcrm.cloud/upload/files/fizumupuvatetafamiponov.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/sekimafopisax.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff29a9d516---69161049585.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160968abfe4593---24759162014.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e7699fbfe73---17657109589.pdfIn PDF document text
    • https://shriayurvednagpur.org/public/ckfinder/userfiles/files/18380211248.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/2486531939.pdfIn PDF document text
    • http://grupophi.es/uploads/files/rijijiw.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/bupazunotipit.pdfIn PDF document text
    • 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_off0000bda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDA9 18820 bytes
SHA-256: 5de8d28c97219383c4b838bb5421b8aa91555efcd980088842f728ecf194ed44
font_01_sfnt_off0000edc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC7 10840 bytes
SHA-256: 907a7ef7c090c8c3aa3e27ff1c62da854565a306ab4e1983c08869059b1dbe8a
font_02_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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