Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a6e36226b960ec…

MALICIOUS

PDF

113.9 KB Created: 2021-09-09 16:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 3e1240468894a6c677b2b5c4ea962700 SHA-1: bf4a05c9f8b9d8e1dc7aa363a9b635991eb5ce9e SHA-256: 18a6e36226b960ecad6a6f89c662fb29f0c86c4e65758bd381296535a32a54ec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to obscure the ultimate destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://iproperty.ae/userfiles/file/lopuvinagika.pdf In PDF document text
    • http://goteneplast.se/files/images/file/40010799447.pdfIn PDF document text
    • http://namkhoabacninh.com/images/files/luwosodujidib.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/sawoxo.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16134b7e1db6b4---miwezaneturutidazuz.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/bufuz.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/57085575036.pdfIn PDF document text
    • http://mascotdd.com/file_media/file_image/file/99242061249.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/duvorukolixugetetoti.pdfIn PDF document text
    • http://mopron.ru/upload/files/99788849739.pdfIn PDF document text
    • http://maksimetall.ru/files/62349560479.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393971c634e---balulusafu.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/48873956665.pdfIn PDF document text
    • http://njbeihang.com/uploadfile/file///2021090105355169.pdfIn PDF document text
    • http://tchid.net/userfiles/file/lanadonunavaxixedil.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e3ab338ac---46741165065.pdfIn PDF document text
    • http://www.psoealora.es/ckfinder/userfiles/files/nutipob.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/19560400601.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613149b8a0ca6---15230885407.pdfIn PDF document text
    • http://sherwoodchambergolf.org/ckfinder/userfiles/files/rolisasijatemibomoseru.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139499281b5d---26019811516.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/3158600305.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/zawazawujezomagibuxuz.pdfIn PDF document text
    • http://silarperu.com/UserFiles/file/sesakewivowijidez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=strike+force+kitty+last+stand+no+flashPDF 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_off0001503e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1503E 10856 bytes
SHA-256: bdb7ea72be7539032f66d7ad8ad00aeadbe435d308f2a39d0e613402cca1746b
font_01_sfnt_off0001693f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1693F 21384 bytes
SHA-256: 2bc34a7edea1d328301d30cb3d210c05fef3167f524306d30226aea324fa8203
font_02_sfnt_off0001a189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A189 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.