Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd7d0e9cffc38bb…

MALICIOUS

PDF

84.9 KB Created: 2021-09-17 12:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 69ee894a33ba2dab75d3a01cce68d12d SHA-1: 06c0f09489d71fe723a3bb7521dbe2791be1184f SHA-256: abd7d0e9cffc38bb81fd821ee48557ec6869eab92a86918d4b19fc32ff58b2ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many of which are part of link farms on disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=oreo+tv+1.8 PDF link annotation
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136122d4c903---babeladagaboturidivura.pdfIn PDF document text
    • http://hujiangsy.com/upload/files/rofubekunixuviwapeguraw.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///gamoranu.pdfIn PDF document text
    • https://vzglavniki.net/data/file/8064189785.pdfIn PDF document text
    • http://shceping.com/upFile/photos/2021-9/file/puxotafixamojurazubumi.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/vutizovupadudoran.pdfIn PDF document text
    • http://pedraferro.com/files/files/11046149376.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/14597585543.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404bf62338f---83626083772.pdfIn PDF document text
    • http://utcsp.rustyramone.com/uploads/files/55323920092.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/16643931929.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210901161711.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/fovixavogesi.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/98496906687.pdfIn PDF document text
    • https://repairbase.net/FCKeditor/editor/filemanager/connectors/php/images/file/revokejakame.pdfIn PDF document text
    • http://energywork.pl/userfiles/file/23543450390.pdfIn PDF document text
    • http://seger.cz/userfiles/file/puxijunuto.pdfIn PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/17635625998.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/81677857497.pdfIn PDF document text
    • http://ckattorneys.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/liselunebujugakuzunib.pdfIn PDF document text
    • https://centaur.vri.cz/docs/files/petif.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/83545077065.pdfIn PDF document text
    • http://sarljarry.com/userfiles/file/37334681206.pdfIn PDF document text
    • http://xn----9sbbnbtte4cyg.xn--p1ai/ckfinder/userfiles/files/62586176740.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_off0000e679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE679 9944 bytes
SHA-256: 264677f679c329ba925e4959e31114a7abc682b87fc270950cf85df6897d709a
font_01_sfnt_off0000fca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 19028 bytes
SHA-256: d25651cfdd770e533ebf94a6616814b4b4848710b8c268e99d563ef727982733
font_02_sfnt_off00012dfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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