Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02ec64167ef884…

MALICIOUS

PDF

94.1 KB Created: 2021-08-14 12:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2d06c28ac27c540add83819e0cae6bd0 SHA-1: 6b6de89ad6f74c54f4c769d64e1edf25e421e0ce SHA-256: ee02ec64167ef8848fd4fe0d7492f5503e7d87107557d350536fb848b8f13261
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm directing users to numerous external URLs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is unreadable, but the presence of numerous external links and the high confidence detection scores point to a malicious document designed to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • 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://ansonseatery.com/uploads/files/xikixov.pdf In PDF document text
    • https://yellowstonewildlife.com/90242629001.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/100d5a96b4bc365ea7a4d1708e7e55b0/xetunobakonopodudoxulemi.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/jimedaleledodu.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/f9ggn4om1flirh971egspeotlp/43849672549.pdfIn PDF document text
    • https://aurorabersinar2.com/contents//files/87362562811.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/visifajafesu.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b55ca84164a---wodopazovubi.pdfIn PDF document text
    • http://kbchina.de/upload/31813646007.pdfIn PDF document text
    • https://fotovipvercelli.it/file/fulom.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c10eaa68c97---17438294905.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/dilomovefumokigepu.pdfIn PDF document text
    • http://imailbox.nl/images/uploadedimages/file/mewibobil.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/wodozu.pdfIn PDF document text
    • http://gyobel.itpublic/file/posurebigib.pdfIn PDF document text
    • https://btegypt.comfile/vafemifevif.pdfIn PDF document text
    • http://pahsclassof2005.com/clients/d/d6/d61c4c031b0f3af13d3e88110ef3a3e1/File/tufatawivefereto.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/97767911090.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081e801f34e0---14852224849.pdfIn PDF document text
    • https://aftaplan.com/works/peepsparty/html/upload_files/file/68023833590.pdfIn PDF document text
    • https://thuaphatlaihanoi.net/uploads/files/mewexirofakedikobeman.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/4u219tq1h06sjvq25cco9ishep/lazajepogasidixivubu.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/7b01cce1d3a8bc37c0e09bb4bee312d5/61105388379.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/tosebumar.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc76e81d226---48719784092.pdfIn PDF document text
    • http://bjjiffy.com/upload/ropexidukizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=hearthstone+battlegrounds+minion+type+tier+listPDF 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_off000105f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F0 11184 bytes
SHA-256: 18dbc7e98e3584fed241adf8e44dbad669c5ed70f11a922f297820599f52b62e
font_01_sfnt_off00011f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6F 18580 bytes
SHA-256: a4a5064d772a76478d76977692e71edb6218ea2e68df08acda4b9dd68d1bdecf
font_02_sfnt_off00014fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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