Malicious PDF — malware analysis report

Static analysis result for SHA-256 2199d50a80196dae…

MALICIOUS

PDF

74.7 KB Created: 2021-09-19 11:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d2ffd8a09272fe67dccd7322f1803e21 SHA-1: cb34a924f6557d539f7fe7275c4b3669df290361 SHA-256: 2199d50a80196daec9edebf8126580942e2383be1f2ccd897484219900db9f31
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating an attempt to redirect the user to malicious or unwanted content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The presence of JavaScript points to its use in executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d109ad9f22cb9e6c5ca5267f9f313eea/14417968820.pdf In PDF document text
    • http://studiomanzetti.it/userfiles/files/60192080849.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/96464548300.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/ligexoluxozaxuxo.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/lifopodijezepewawanela.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/8056810998a8b698a2edff6ef914a7b2/vebile.pdfIn PDF document text
    • https://sitycare.com/FCK-UserFiles/files/jipetoguxutikaveminop.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/83136822831.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/82837211026.pdfIn PDF document text
    • http://banglenhospital.com/UserFiles/File/vokefenu.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/fajazafipar.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210911_045629.pdfIn PDF document text
    • http://emeat.ru/var/files/bivigegodogagadi.pdfIn PDF document text
    • http://collegium-connect.nl/ckupload/files/powugetak.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/xujiwerudevup.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/xodirajeb.pdfIn PDF document text
    • http://santiagoporter.com/js/ckfinder/core/connector/php/files/44265134708.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/pasegonisoranuf.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/46415596976.pdfIn PDF document text
    • https://valenciamaids.com/userfiles/files/62814446576.pdfIn PDF document text
    • http://daiichihousing.net/uploads/news_file/80565516200.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/58002207037.pdfIn PDF document text
    • http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50221933033.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/7137901498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=download+gigalife+appPDF 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_off0000c3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3C0 10396 bytes
SHA-256: f425f7796fae5463c8d106c4a310ea934382f4b8ebb858acd28e4322b4a16a3b
font_01_sfnt_off0000db28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB28 16520 bytes
SHA-256: 979de363c093e8a8ed9bdbbf214d3ef5b76af876f6fda62df688b67558db7c22
font_02_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1