Malicious PDF — malware analysis report

Static analysis result for SHA-256 30292ef539bbbf4e…

MALICIOUS

PDF

86.8 KB Created: 2021-06-29 02:36:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 272eedbc96116f365696e6f6779e4dd0 SHA-1: 65c9421f56bc71e243fa95ff01ca04b57f2f807e SHA-256: 30292ef539bbbf4e537314f8dd82cf70b7ca2e70be23672c4076226215ad3fba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to exploit users through deceptive redirection, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • 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://baongochoa.com/upload/file/45496073605.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/1dbb35e196f228c001c2985405096f57/18629920200.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdbac47a1d---wokiruwaritepabuvi.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160d834d5a1f8c---69049011065.pdf
    • http://artospace.com/pics/file/55416942879.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160ac17c5b1591---vofuzapif.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16075f40898450---jafipa.pdf
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/6ea754a374a835961730fac229c80a2b/newosepavo.pdf
    • http://www.contectrade.hu/fckfiles/file/wederor.pdf
    • https://eltonltd.ru/sites/default/files/uploads/97390254273.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/mm0np82m8onik97arop15pfe4r/52471061455.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a3d5d5ecf---tujisoz.pdf
    • https://burlingame.com/wysiwygfiles/file/pomamavar.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f44a383e---zifimagumarumuxujirofaje.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f473952077---25880853393.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/c86c586453b72778082b8e5ea4c50214/88067936447.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735f49bf837---surigomaxulonijox.pdf
    • http://alexandraharris.com/clients/36054/File/11495853212.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afe354e8848---50509187703.pdf
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160c000b944c80---josuxekipaju.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2183cee1a---vamidunirujererilefazotex.pdf
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b62c4f338e4---pejesekabivopogasepa.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089243aed8a0---xuwamalunuzixogogozaresep.pdf
    • https://baobihungphu.com/media/ftp/file/8650184309.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea9f5b1d3---10275188848.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+hit+the+long+head+of+the+tricep
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e83e.bin
97a693020a9c67c913fa5abf5d83a61848c846aa130c5182d8e66f233602b60d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE83E 2044 bytes
font_01_sfnt_off0000f18c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF18C 16792 bytes
font_02_sfnt_off000109a3.bin
d69bfd2d94976c8bab4b232131888ec0357bd59c6e551e766c56b929d338c2bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 10808 bytes
font_03_sfnt_off00012243.bin
da7704091c6e3f961293c19bcd83b3155a1c3ceca34b335cc6fcbf2fb569c887		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12243 16628 bytes

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