Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedad89acc699802…

MALICIOUS

PDF

68.1 KB Created: 2021-09-28 15:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: b035413f537df671ef3015c69bf54597 SHA-1: 551a12fe90c82e724a664faf4c0f1adfbfe1189c SHA-256: eedad89acc699802216173236c3e4369e409be5ed89b15baa51b8192b67e2399
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links pointing to potentially malicious or disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of its harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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://accessiblevehicleservices.com/userfiles/file/xulaxanuveje.pdf In PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/28320280870.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16151a8fd4f2b4---73079452869.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/fuguzod.pdfIn PDF document text
    • https://tmtteks.com/files/dojopunexuwinedewesa.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16134fb6c078bf---32879561828.pdfIn PDF document text
    • http://ameshamagazine.com/js/upload/files/wojurilobasabotoziz.pdfIn PDF document text
    • https://cmflower-kkc.com/ckfinder/userfiles/files/jigugapotokuvefebenojax.pdfIn PDF document text
    • https://maharajganjtimes.com/assets/ckfinder/core/connector/php/uploads/files/26031956568.pdfIn PDF document text
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/sijuwo.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/24793815814.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/59930632224.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/21964489407.pdfIn PDF document text
    • http://thaiurethane.com/userfiles/file/sikiwemuxusudij.pdfIn PDF document text
    • http://bjsddesign.com/filespath/files/20210917200625.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210904152138.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/31414861963.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/64866423214.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/35514482272.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/63868533187.pdfIn PDF document text
    • http://alianzablue.com/aym_image/files/jivomogu.pdfIn PDF document text
    • http://hdg-gmuend.de/userfiles/files/846425314.pdfIn PDF document text
    • http://soojuspilt.ee/files/file/ponuxufig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=best+nova+gamePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECA 10332 bytes
SHA-256: c5c4e9ff1d75d9bb94ec1f48563fcdf7a780baaff3f12af7dfdd2a55d4276f6b
font_01_sfnt_off0000c636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC636 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 14740 bytes
SHA-256: 978932ff185b4914b959b83fa18cb2138cbed4e47ee471956ae6bfdfd1e68768

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