Malicious PDF — malware analysis report

Static analysis result for SHA-256 54300ed0ed446aa5…

MALICIOUS

PDF

81.2 KB Created: 2021-09-17 16:19:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: b39c417e989cc5d7c5864f6df0cd12f2 SHA-1: ed1300edcca05e87495cf05825cceabb4f27d154 SHA-256: 54300ed0ed446aa58fcd644b9a7b831cc1e4896f3fdcc0ac0056b775c96df0da
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests these links are part of a campaign to distribute malware or conduct phishing. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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
  • 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://queure.ru/uplcv?utm_term=luca+full+movie+english+free PDF link annotation
    • http://tokyosushilohaus.com/uploads/files/tojupavizugodadesakeb.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/85347922122.pdfIn PDF document text
    • https://europawindow.com/app/webroot/img/main_content/files/nifupofapej.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/degosofezevegoxaziwit.pdfIn PDF document text
    • http://www.farmaciabergua.com/userfiles/files/noxosirefetaveje.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/jepezixawuz.pdfIn PDF document text
    • http://michelesherrinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nifibifusi.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/xadetubetaxokemo.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/18933024981.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/kikowi.pdfIn PDF document text
    • http://konferencii.org/web/uploads/assets/file/97471625906.pdfIn PDF document text
    • https://gamepinleri.net/calisma2/files/uploads/68959824236.pdfIn PDF document text
    • http://gyarmatilovastorna.hu/userfiles/file/3827918337.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/vuduluzinimi.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/99584137676.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/memunerikixu.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134c020ad2c3---pezijikonop.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/bd399e3efa5e3b0826ed4263b2de013a/47136079880.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/xunebavidepetago.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/topixesezujarera.pdfIn PDF document text
    • http://hebakotb.net/userfiles/file/8229667078.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_off0000d441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD441 10808 bytes
SHA-256: 9116f82c7a273928e0cae82fac2a5a2920dbe9072306784ca70e6d05bb1d4cdc
font_01_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 19300 bytes
SHA-256: f64d578377697f4625e553a7010d7d71ec6c2d7deb47c410fb09685ca93a4a7a
font_02_sfnt_off00011eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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