Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2eed53b948104e9…

MALICIOUS

PDF

83.5 KB Created: 2021-09-13 07:06:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e451f1a366c9b7aaf8f25dc56999fe76 SHA-1: 8be339fe52abb3979eb58d42a45b1acda781908e SHA-256: d2eed53b948104e9c54b6e80ad787b6473b052d6fffd83943b16cffc167a348c
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 facilitates the redirection to external URLs, as evidenced by the PDF_URI and EMBEDDED_URL heuristics, which are often used in phishing or malware delivery schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://tufaghanafc.com/js/ckfinder/userfiles/files/kopizuxebiwape.pdf
    • http://seidels-mineralienwelt.de/images/uploaded/file/70077150447.pdf
    • https://kalashad.com/userfiles/file/78228961628.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/fuxevazi.pdf
    • http://canxetaianhduc.com/images/file/duwazakegewarogosumuxib.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16138e32bc01a3---62672552968.pdf
    • https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/39043107099.pdf
    • http://fujieshubao.com/zk/UploadFile/file/2021090504245873499.pdf
    • http://primethailand.com/ckfinder/userfiles/files/31064817842.pdf
    • https://bientannamhuy.com/wp-content/uploads/files/57759535198.pdf
    • http://palyavalaszto.hu/teszt/upload/file/77431060329.pdf
    • https://fo-prefectures.com/pages/files/86347142634.pdf
    • http://kool-house.com/upload/editor/file/62577723635.pdf
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/wujumibupupexememux.pdf
    • http://novehorizonty.sk/userfiles/file/61339516507.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/meav23k9tusvlt34lk8iv64lr6/musapugisutowevuzavot.pdf
    • http://buren-kompanie.de/userfiles/files/wumov.pdf
    • http://varosom.hu/userfiles/files/duwopavibo.pdf
    • https://etravelbox.com/scgtest/team-explore/uploads/files/kewusanurunelejes.pdf
    • http://humidorio.de/ckfinder/userfiles/files/69702429965.pdf
    • http://pazarziraat.com/userfiles/file/67617068628.pdf
    • http://qianxish.com/ckfind_image/files/linobiba.pdf
    • http://londonjip.com/userData/board/file/14422724849.pdf
    • http://lexprikson.com/admin/style/images/userfiles/file/zagedumara.pdf
    • http://teleinwestor.com/userfiles/file/zakij.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=friday+night+funkin+soundboard
    • 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_off0000e0ea.bin
7bb05b0223f3b6b77d09201b1e4864583d32a75df19929aef03726abf4aaf25a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EA 10880 bytes
font_01_sfnt_off0000f9c1.bin
1d9b5f8ee3178b1c40211f831d4fd14147055a0d3d241c8dd08235374e792ac4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C1 17760 bytes
font_02_sfnt_off00012846.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12846 16792 bytes

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