Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ec888fdacb503e…

MALICIOUS

PDF

67.8 KB Created: 2021-05-07 01:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1cb5690407bd9935bc8354650ee50c5d SHA-1: 71d1c6b4c00c35d1cbf1a0e0819b3121c6258153 SHA-256: 91ec888fdacb503e32a8fb82d68fb72186f8f7e1e128b97ef421bcf7247cd8e5
96 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs that point to other PDF files hosted on various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for credential theft or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://aadhaarretail.com/administrator/imagetemp/file/jenikakazamakavek.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/dtg4ksc70ck0no4hhbckbjvobb/fokowatusa.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/6c648c484c781a06f541618796ae729c/gibedoxajotafadasod.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/4dd9cff76b444e203c6afdad724c1465/22640673025.pdf
    • https://svrcontractors.com/wp-content/plugins/super-forms/uploads/php/files/17e74d9641a66b8864b868c4ea8eb6c2/xemerovulopexo.pdf
    • http://shuswapladystriders.ca/userfiles/file/sidusoduso.pdf
    • https://auto-rujo.com/images-editor/file/wibukulikakolewizugu.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608130bf80b61---buxexifagedogerabilolele.pdf
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0ab002503---pegevegun.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/0db3b682dfbd0f87246eb3b83809d0b1/12862671780.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160734c002842f---luzubevuxedaxazifotidetox.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160876c3818443---pomipano.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/885b69742107407dfe12c0ceca5510c2/69360680671.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f479a1abaf47ad2a5497fc078490dd97/40535409233.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607438f2f4165---mikoduzugixegelusigofamis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=ccs+heart+failure+guidelines+2017+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccbb.bin
9916f8cc99e21c7b3743dabaffedde80c9f62b308066a61bd4340939af731af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBB 5728 bytes
font_01_sfnt_off0000e03d.bin
ae14fea1e70b42b5f03c5214800d2226de26dfe70921af6b4e427a143f4141c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE03D 9968 bytes

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