Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab2bbcb1f803b5c0…

MALICIOUS

PDF

76.2 KB Created: 2021-09-23 23:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a9b64f90724956e644986ec69ea0afdd SHA-1: 9051bfff215ce017473e0069c00dcd5b023c457d SHA-256: ab2bbcb1f803b5c0652c92f3ec5b355481d12e74cee9e531a094f26e568f5ac3
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to one of the numerous external URLs found in the document, which are often used for phishing or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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 http://files.ibiza-ferien.de/file/mofuwulelasipev.pdf
    • http://pscworld.eu/ckfinder/userfiles/files/bugasuse.pdf
    • http://lezeckastenakosice.sk/upload/files/xafimeze.pdf
    • http://www.jindatunnel.com/up_files/file/mepefakifusap.pdf
    • https://eventpro-kontraktorpameran.com/uploaded/files/vodujosutalugufivegito.pdf
    • http://jjw-led.com/userfiles/file/niledenijurop.pdf
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/52120916221.pdf
    • http://chroscina.com/userfiles/file/fajukisitepalakejiko.pdf
    • https://ateliersmq.com/pevron/www/img/file/kiminiduxina.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613d37dd96d27---felubegodamasuvowefuwo.pdf
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/69793257832.pdf
    • https://gdwtechnology.com/fckeditor/file/
    • http://studiotecnicolamanna.com/userfiles/files/retapuwapewar.pdf
    • https://doctmcooper.com/userfiles/files/74332779007.pdf
    • https://perfecthospital.org/FCKeditor/file/detatepomexop.pdf
    • http://nousgarage.com/userfiles/file/tubinenivik.pdf
    • http://schule.havonix.com/ckfinder/userfiles/files/7358698154.pdf
    • http://dekoblickfang.de/userfiles/file/kibamudix.pdf
    • http://semihkerpiccilervesupersound.com/upload/file/52905347792.pdf
    • http://royalgoodviewresort.com/Uploads/file/zegunum.pdf
    • https://hotnewsmd.deca.md/upload/userfiles/files/95824292529.pdf
    • http://saconsultancy.com/userfiles/file/felabojosogibodakupir.pdf
    • http://www.thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/18642215764.pdf
    • https://szallas-karpatalja.net/upload/32782645164.pdf
    • http://tarp.longi.tw/uploadfiles/pefofonar.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/vodirolafug.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=i+spoof+pokemon+go
    • 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_off0000c51f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC51F 16792 bytes
font_01_sfnt_off0000dd31.bin
4c0e32a2ad97c6db47ca0cc8b2eecea4d01dc223cddd8f4aadc38872aa5eb931		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD31 18212 bytes
font_02_sfnt_off00010c50.bin
7712347657759f0a5feb7fe1cf806610c0944a9e113c81543b24d59a2ad99bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C50 10248 bytes

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