Malicious PDF — malware analysis report

Static analysis result for SHA-256 07a49ecac17af8c6…

MALICIOUS

PDF

77.6 KB Created: 2021-08-23 21:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: ac492d4193bdece4a53f57226ecba15a SHA-1: a5d74c77c2bfa0fa3d3730e02ff093335b576c39 SHA-256: 07a49ecac17af8c685e8ab16936c66e547ebc59ff8a484798b6ea067becb4020
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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, many hosted on compromised CMS upload directories and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://dawahcity.com/userfiles/file/53756169556.pdf In PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/orino0v2hmagegbjgeutcis5t7/woxuzulavupepaj.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/sobuku.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/1f54d63718d1a903a4d53cbc4e1a911f/50857504515.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b6659eeb347643c2554113e90f9ba0b7/34622182884.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/kevavajisevobi.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0f405b90f---40149319925.pdfIn PDF document text
    • http://ediljolli.com/userfiles/files/9701227849.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/101249013927.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/a99bb1df3dfdb945c3dbc771f5c2afba/95207473803.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f4f172e1b---74064958336.pdfIn PDF document text
    • http://trendstyleimage.com/uploads/ckfinder/userfiles/files/89409456541.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/ps0aiigv1rff1946jne216m7t1/nakamak.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/55840794799.pdfIn PDF document text
    • http://tourister.kr/userfiles/file/xadidipabonozebolufa.pdfIn PDF document text
    • http://sourceit.ke/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/robaromogu.pdfIn PDF document text
    • http://angeladaniel.de/uploads/files/36014195359.pdfIn PDF document text
    • http://popmetre.com/news/files/megil.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/dee0ad5191bc68f5a4128eec90b54cc5/68311221995.pdfIn PDF document text
    • http://serextion2006.com/js/upload/files/bedemumexamesamegulisete.pdfIn PDF document text
    • https://makeswebsites.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/39344713561.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/o9bgagca3l7i37o4qflr4d7h89/kalijatiri.pdfIn PDF document text
    • http://tieclangman.com/Images_upload/files/83954023116.pdfIn PDF document text
    • https://amgaa.org/temp//files/1391114619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+much+would+1+million+robux+costPDF link annotation
    • 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_off0000d8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F2 16720 bytes
SHA-256: 65e6321f9ffe89fec94c8b43f706d3e76816fca28fed21e4265dda461bf5cb73
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB5 10812 bytes
SHA-256: e3290f72bf2c0c3a5319cadf8237c2626f541cb6c628fee3d61c630158301c8f

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