Malicious PDF — malware analysis report

Static analysis result for SHA-256 79206b746250b1fb…

MALICIOUS

PDF

68.0 KB Created: 2021-09-26 20:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 462ac6c236ed1015a7e0197458809bbe SHA-1: 84e741c33b2bbb813ff814d71a7e40712a079a07 SHA-256: 79206b746250b1fbe9012766d5de772245d865e5f5d307e3e733423e4d43c536
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to domains associated with link farms and disposable hosting, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML_NYX_PDF_MALICIOUS heuristic also strongly suggests malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious document designed to redirect users to potentially harmful content or facilitate SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 4

  • 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://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/0bc6cbedcdfe9c043506dee4464e0656/46468662523.pdf
    • http://dkind.net/userData/board/file/zujiwi.pdf
    • https://sassanoproperties.com/FCKeditor/file/bixedavediruwejija.pdf
    • https://fnb-concepts.com/images/uploads/files/fumekiparak.pdf
    • http://entrackintl.com/uploads/japobamidizowemagapupufe.pdf
    • http://mebizstekla.ru/userfiles/file/nivamekov.pdf
    • https://onlinendttraining.com/files/vogawowime.pdf
    • http://sibinetweek.ru/userfiles/file/zawomuwavurote.pdf
    • https://turdv.ru/SITE/files/editor/file/xapobamu.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16141a4b06cacf---gomalafajomu.pdf
    • http://zhhyhb.com/uploadfiles/files/koveb.pdf
    • http://kanalizace-ul.cz/userfiles/file/lowabekuso.pdf
    • https://mchs.kz/userfiles/File/gibapatines.pdf
    • http://www.hz-kontejnery.cz/ckfinder/userfiles/files/korunudesalosimegakebej.pdf
    • http://suriyedostlukdernegi.org/image/files/panigotibamedipopinemod.pdf
    • https://movie2book.com/userfiles/file/fuzebimebakujad.pdf
    • http://energo-winstal.pl/userfiles/file/xadusovogivujurodebipin.pdf
    • https://contabil-fiscal.ro/mm/file/62593483153.pdf
    • https://www.nhabe.com.vn/ckfinder/userfiles/files/39907604328.pdf
    • https://odlingfamily.com/userfiles/file/97293985865.pdf
    • https://alamansyria.com/userfiles/file/89550352474.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=astro+gaming+app+android
    • https://www.thc.gda.pl/ckfinder/userfiles/files/datenuf.pdf
    • 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_off0000ac71.bin
941161182fbbae729ef7f9649f101719cd36f2900d5c339239a5260ee18a8d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC71 10540 bytes
font_01_sfnt_off0000c43d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC43D 16792 bytes
font_02_sfnt_off0000dc4f.bin
d383fa4b9861a6951c373f201f9cc95e10b21d503d860e5c6c926647b2b62263		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4F 14928 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.