Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba46240553edc741…

MALICIOUS

PDF

73.1 KB Created: 2021-09-30 10:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5838899530655f21c1b4a7623ce8a70d SHA-1: 905a2c7ce5d066d14ea8512525c84381441661aa SHA-256: ba46240553edc7416acf699eb1269e4de20001ed22d2a847bc222abee664e754
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 sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) and the nature of the file as a potential attachment (T1566.001) are key indicators.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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://luckysurface.itweald.com/uploads/files/614851ea068e6.pdf
    • http://77owship.netsociality.com/upload/files/bupamib.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/eac40e92939a192ac946134960ba330a/18575522516.pdf
    • https://hagabb.ro/ckfinder/userfiles/files/39432457114.pdf
    • https://vroa.pl/chplusfiles/file/96400470368.pdf
    • https://collinite.pl/userfiles/file/sajuza.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b039251b5d---52487136313.pdf
    • https://nk-sostanj.si/files/file/bexoburojeg.pdf
    • https://motodubai.com/uploaded_images/files/vaxagoketilaji.pdf
    • https://sanaspinler.com/calisma2/files/uploads/zisanefa.pdf
    • http://skiflogistics.ru/userfiles/file/revovawowudikilum.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79782761268.pdf
    • http://railwaysrailroads.com/upload_files/files/merowirizusanopobaweririp.pdf
    • https://harmony.im/userfiles/file/74983483585.pdf
    • http://119pump.net/d/files/17859672439.pdf
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/kutuxibuwijej.pdf
    • http://kondicionery-himki.ru/upload_picture/file/fawutegil.pdf
    • https://tssch.in/tssch/application/admin/uploads/file/jafefelaxodufunivi.pdf
    • http://www.aragonemprendedor.com/userfiles/files/36796991906.pdf
    • http://hanlacsclub.com/ckupload/files/73688515977.pdf
    • http://autovoda.ru/upload/files/juvasu.pdf
    • http://gachmenminhchien.com/media/ftp/file/biveravuwivolibe.pdf
    • https://taxforce.nl/userfiles/files/40172070906.pdf
    • https://vsevolozhsk.mebel18.com/uploads/files/62215217760.pdf
    • http://aluminial.pnh.pt/js/ckfinder/userfiles/files/fibipokuniluvanesalimi.pdf
    • https://hizlipin.com/calisma2/files/uploads/lojumejivov.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+hide+file+in+android
    • 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_off0000b9ee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB9EE 16792 bytes
font_01_sfnt_off0000d205.bin
8d9e4ea287195985b310c6ee423f7ec21e455f2e9b21d697c40e1818d265e12e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD205 10360 bytes
font_02_sfnt_off0000e94a.bin
a914201cf6e24b000eb39cccc882b77d96f526562218f6f796d4f068ffb2b0a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94A 17644 bytes

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