Malicious PDF — malware analysis report

Static analysis result for SHA-256 25e8ceb0f7da842e…

MALICIOUS

PDF

79.9 KB Created: 2021-09-11 03:46:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: c35f196381cfb92c88fdb7833144695a SHA-1: ad29b6f3a87619adad918ec8e3553a3f105511a4 SHA-256: 25e8ceb0f7da842e2e98498df4a04875e6398a75b7298076e19fbab163bf2833
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://villaelen.it/userfiles/files/ripefafipitow.pdf In PDF document text
    • http://bensonlandscape.com/editorData/file/7976690565.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/nugadawo.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/60338908429.pdfIn PDF document text
    • http://chongros.com/userData/board/file/niwixojagowoj.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613683a248a9e---81251414858.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/vulisodiniwaguseminuvego.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202194145583846.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/basiwexuwokisiko.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/gifugedubureruxobo.pdfIn PDF document text
    • http://nepalbestcargo.com/userfiles/file/manasilavaro.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/67466994620.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/wafefoxesi.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/861760921.pdfIn PDF document text
    • http://canadianrockies.ca/files/file/tabapapetibeve.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/1e38be68e1bef2d4a3e7872e27910f07.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/zurame.pdfIn PDF document text
    • https://npkfertilizerproduction.com/d/files/fokipupunaxojosub.pdfIn PDF document text
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/pebekesodaxezixikova.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137873308902---6274260946.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/62992750374.pdfIn PDF document text
    • http://epwuae.com/userfiles/file/girisu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=the+giver+chapter+11+summaryPDF 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_off0000d494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD494 17228 bytes
SHA-256: f0f323504a7849b8cbace3b0e879830b65479b9820a27f125631ceb208bdf43d
font_01_sfnt_off000100d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118E7 10848 bytes
SHA-256: c4e2606268ff2684d3fb69dc92cb23cc9b88ac01e6fdbd7d8626e72bd5276f31

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