Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee127911e9e364d…

MALICIOUS

PDF

75.3 KB Created: 2021-09-13 22:01:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4f06787da7d86d253784508cec529002 SHA-1: 695bf5c219eea527fb6774dc5f54be28bd0aba68 SHA-256: 9ee127911e9e364d0f0fe3d13b51ded763ed2a54a8d744e611c06cce3b005f59
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on suspicious domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites, likely for initial access via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://aliceinformaticasrl.com/user/pages/23630652319.pdf In PDF document text
    • https://mtmnetwork.net/uploadEditor/files/61909141664.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/93615526544.pdfIn PDF document text
    • http://abwva.com/uploads/files/jozexorawazovebud.pdfIn PDF document text
    • http://bienbao.org/uploads/files/11247861127.pdfIn PDF document text
    • https://kit-veron.my/ckfinder/userfiles/files/xofubakalefepifuvamawis.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/11983502662.pdfIn PDF document text
    • http://hajnysport.cz/FCK_userfiles/file/valebutifafowajut.pdfIn PDF document text
    • http://agavietnam.com/img/files/99538744769.pdfIn PDF document text
    • https://journalofcritique.com/ckdosyalari/upload/files/38025455615.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/xadizosoderimavir.pdfIn PDF document text
    • https://viboot.traigiongthuha.com/ckfinder/userfiles/files/64829372042.pdfIn PDF document text
    • https://bozoklar.org/ckfinder/userfiles/files/supipamiwisakixis.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16132bc688ea2d---61293052318.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/52034302191.pdfIn PDF document text
    • http://shoreluxurylimos.com/userfiles/files/66917574861.pdfIn PDF document text
    • http://lovec.bg/root/ckfinder/userfiles/files/26510482060.pdfIn PDF document text
    • http://pc-driver.ru/userfiles/files/36896914823.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/72668188321.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613bb146242ea---goxaxedemuxopunozel.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/56112522001.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/9535374284.pdfIn PDF document text
    • http://sdhmladavozice.cz/userfiles/file/temuwegogixeloze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=ibsen+peer+gynt+pdfPDF 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_off0000c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 10460 bytes
SHA-256: 92161b87ed6ee84657c00377aa274970add0f2b6a907299b505dbdeb89f7e544
font_01_sfnt_off0000d826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD826 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF038 18156 bytes
SHA-256: 2029a098596a3abfab4595d52acb64bc4597deaac7237dea80271e9cd5857bd6

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