Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68fe24c6f140f82…

MALICIOUS

PDF

70.0 KB Created: 2021-10-02 22:56:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 0e464a3d45461a27e3f864a39579c770 SHA-1: 60e08892f1a4e780360dc8e93eddbfcf439a9008 SHA-256: f68fe24c6f140f82b9fca622ee2c27e94aae20e5fd29b03206399692a667925f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high number of embedded URLs pointing to various domains, suggesting a link farm or redirection scheme. The ML classifier strongly indicated maliciousness, and the presence of numerous external links aligns with tactics used for phishing or malware distribution. No scripts were extracted, but the document structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://laborke.ru/uplcv?utm_term=what+type+of+soil+does+aloe+need PDF link annotation
    • https://fotobolfestmeny.hu/mvc/userfiles/file/pidufa.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161543642480bd---18666845589.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/ftf366eo9v61d6k0oh17j39l91/gumidivu.pdfIn PDF document text
    • http://digivideos.net/ckfinder/userfiles/files/35369494653.pdfIn PDF document text
    • https://tl-systems.hu/files/files/devopadanoletiniw.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/11916795609.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/45301585584.pdfIn PDF document text
    • http://antopol.topmebli.com/content/xuploadimages/file/54507784652.pdfIn PDF document text
    • http://cec-intl.ru/app/webroot/files/file/11398781839.pdfIn PDF document text
    • http://anninh247.info/upload/files/nojulovemuguseni.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/4892725030.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/kujosipenufasukizofe.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/46388971995.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210926_851A290EBB51DFD4.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/39094820000.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210930172437_9m9pta.pdfIn PDF document text
    • http://mwflower.com/upimagesfile///43363821810.pdfIn PDF document text
    • https://cosplay-expo.it/ckfinder/userfiles/files/83144852321.pdfIn PDF document text
    • https://superpart.com/files/73786038013.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/diwokegibinugovanujiwefu.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/wezafewo.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/68144604124.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/zaletivuno.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/13575871700.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/fogilinamuxogegatajajaja.pdfIn PDF document text
    • 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_off0000b334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB334 15340 bytes
SHA-256: 6879d4ee57e1d10e96d7a941bc2371f6f069c763d0f20332257a548c389a2321
font_01_sfnt_off0000d9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EC 10604 bytes
SHA-256: 10a8164ce765dfddd283c8cc38b105b0df13e9a3e38b97f74855f758ef3b1634