Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f0049c84103464c…

MALICIOUS

PDF

71.9 KB Created: 2021-09-26 21:07:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64b5681615060ce12a4867a8fc7ee491 SHA-1: b968bf057ed494344ac546d31fe90582994f09a2 SHA-256: 6f0049c84103464c002fa91fdccdda46ae0df102a5a632dc87ab5af3274130b7
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. It also references multiple external URLs, one of which is flagged as a link farm, suggesting a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for delivering a phishing lure or downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://rayhovietnam.vn/upload/files/48313371046.pdf
    • http://mywayrtk.org/userfiles/file/87689558335.pdf
    • http://slstudio.it/userfiles/files/xodakixorifawek.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4399a8b2c---89224087.pdf
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pilive.pdf
    • https://unaizahic.com/Files/files/zitojodakaloxo.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/beduxedefuzarorak.pdf
    • http://columb-sklep.pl/userfiles/file/jogiwubefafeturevotina.pdf
    • http://secohthailand.com/file_media/file_image/file/korenab.pdf
    • https://ginniglobal.com/uploads/file/42608066581.pdf
    • https://escaletravel.com/userfiles/files/larav.pdf
    • http://hokkaido-love87.com/app/webroot/js/ckfinder/userfiles/files/17776102424.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb188137be---28693226017.pdf
    • https://smshealthcareservices.com/ckfinder/userfiles/files/24666236335.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f321607846---tibozitenigerinikidobafo.pdf
    • https://hijaustabilo.com/contents/files/9054366112.pdf
    • http://hifitness.hu/userfiles/file/66655703489.pdf
    • http://greentreeprep.com/cote_dor_import/admin/ckfinder/userfiles/files/nalenolositibit.pdf
    • https://registracijakoncar.com/webroot/js/ckfinder/userfiles/files/11974297793.pdf
    • http://swatimishra.in/uploaded_files/userfiles/files/galulabajavizepet.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613db3bc56d54---26366247211.pdf
    • https://safe-international.com/userfiles/file/92537690870.pdf
    • http://gaytonfa.com/upload/files/84703580387.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=money+live+wallpaper
    • 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_off0000b532.bin
0901ae7a609f323aa2f2493a5236f11a6c498606b53813c5abc6809daead7cd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB532 17736 bytes
font_01_sfnt_off0000e2ab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AB 16792 bytes
font_02_sfnt_off0000fac2.bin
07c94a12c1d9f7ae2c4b96b2b69e8ed57a5e9993ec4651ecdd68b006f544cc45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC2 10240 bytes

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