Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e5066a2ed2de6c…

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 11:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ba6fec735a0b8e54469af899c6f0fad SHA-1: fd435f7a9218edb9b0d50e2ab51d186d366edd75 SHA-256: 49e5066a2ed2de6c5e5d68f713710ba79232765a4beabb173917b48ef68f0ac1
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 0.9973

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://henskeschildersbedrijf.nl/upload/93886100665.pdf In PDF document text
    • http://adabaskimerkezi.com/upload/file/talijowovisigowupowadoti.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/fobofugobunesafeno.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/45530389236.pdfIn PDF document text
    • http://jessie.vn/images/ckeditor/files/92497091655.pdfIn PDF document text
    • https://penzion-pod-rozhlednou.cz/img/file/gugap.pdfIn PDF document text
    • https://areicon.com/images/file/wibuxebam.pdfIn PDF document text
    • http://henzefashion.com/userfiles/file/60689569754.pdfIn PDF document text
    • http://bilafafafa.com/shopadmin/upload/files/9564651485.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/85900j2k8tn5bsvf548mh154j5/53232862205.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210915_565742B31C037AE5.pdfIn PDF document text
    • http://garmaclima.com/uploads/ckfinder/files/39701904862.pdfIn PDF document text
    • https://nocenzura.space/web/img/podborky/files/79266181057.pdfIn PDF document text
    • http://dellalontra.it/userfiles/files/21247044862.pdfIn PDF document text
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/10289579278.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/11885742063.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb5794e355---dixovakigukasopame.pdfIn PDF document text
    • http://veiligheidssloten.nl/ckfinder/userfiles/files/rakamizasuduvarevanol.pdfIn PDF document text
    • https://nurea.se/currency/userfiles/file/wofolunarenojobupoxetejaz.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/jegusisiselosewuvidem.pdfIn PDF document text
    • https://cedria.es/DOCUMENTS/FotosFCKEditor/file/68535366066.pdfIn PDF document text
    • http://ersenergy.com/UserFiles/file/sunudiwazenonodazugo.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vaxiwebadoroxemekegazolo.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/fezugejumarilijaboxapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=difference+between+robots+and+androidsPDF 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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 16696 bytes
SHA-256: ef08f63a9e552b00af5c1b619b2b573a8965609ee1dbf20a0aca1c9b9b5357b6
font_01_sfnt_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 10652 bytes
SHA-256: 4249cb70d01cd00cec1189bba6b8a2fe5d6dfe20f2080b5360e04f2a0346f72f

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