Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e0e79ad29f54f26…

MALICIOUS

PDF

74.2 KB Created: 2021-02-16 07:38:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d766ff46282743b86687273dd1bc97ae SHA-1: 1f4db21b497f1a35f91870774beac05e946317dc SHA-256: 6e0e79ad29f54f26d7f3e63b19fa7a79954f7e67dc301ddbe37a26d3fa9ea616
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it is a link farm on disposable hosting, designed to redirect users to external URLs. One such URL, 'https://jacksth.ru/wix?keyword=download+clash+royale+mod+apk+rexdl', suggests a lure for downloading a modified game application. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://jacksth.ru/wix?keyword=download+clash+royale+mod+apk+rexdl PDF link annotation
    • https://ruxibotululag.weebly.com/uploads/1/3/1/4/131408142/1503428.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451565/normal_5fdc752899020.pdfIn PDF document text
    • http://lalexejiwisejul.iblogger.org/vojarodoxaxegeborugojilin.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/19f929abcc134.pdfIn PDF document text
    • http://registrat.space/amma_nagamma_telugu_movie_songslyd5k.pdfIn PDF document text
    • http://copyrightmediahelp.com/easy_skateboard_tricks_that_look_hardxruva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5ffbb8c33b4b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_5fced34c2db38.pdfIn PDF document text
    • https://cdn.sqhk.co/gixezovof/ifigjbT/57693750396.pdfIn PDF document text
    • https://cdn.sqhk.co/safovokon/vbtjgid/67455051371.pdfIn PDF document text
    • http://postel-na-zakaz.ru/clubbers_guide_to_ibiza_2002hxfnp.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wilirumam.rf.gd/guide_post_hotel_bradford.pdfIn PDF document text
    • http://muwaziri.epizy.com/cardiology_an_illustrated_textbook.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 1876 bytes
SHA-256: 55e4f348492c8d91575c64ee59a216331e48d46c866dc7486d6a36d7e0ba6293
font_01_sfnt_off0000d808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD808 5296 bytes
SHA-256: edd209283c3d0c10809d59b4c959584bd051b77b01d35958f8cf66c106c47fbc
font_02_sfnt_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 10472 bytes
SHA-256: 8e8f31fd155b3ca81f21538708506302e56c32fe80b3f7b2a7e489c5dcb90899
font_03_sfnt_off00010dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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