Malicious PDF — malware analysis report

Static analysis result for SHA-256 302273eacb8d3cc8…

MALICIOUS

PDF

71.0 KB Created: 2021-09-03 06:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 7842987ff2f747d1474e7d89057ae395 SHA-1: d05fb880d10dea33bf6a186287386a6a6284ccf4 SHA-256: 302273eacb8d3cc86baa499c7d497201ee5fe4c414c81e362dd2189783368743
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and other domains, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/50826826544.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9f1fd5a7f7---81672436109.pdfIn PDF document text
    • https://munord.com/wp-content/plugins/super-forms/uploads/php/files/13ed85968f5e3381fd5db72fcb8eaa48/60189260998.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160a578223d2f2---surunibegupapedepe.pdfIn PDF document text
    • http://www.rafaellucenaehijos.com/ckfinder/userfiles/files/3272029957.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/surewewanusilezop.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/tawaguzerawetob.pdfIn PDF document text
    • https://www.auto-ecole-rive-droite.fr/ckfinder/userfiles/files/xajimuzesovubafigeromi.pdfIn PDF document text
    • https://valleyrestoration.net/home/apf/public_html/ckfinder/userfiles/files/18888140974.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/79762391271.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/51426504408.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16120f16c5ea96---56404462431.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/wasitobudaw.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/25557788888.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/wanalulukuju.pdfIn PDF document text
    • https://ikansambel.com/contents//files/demexudos.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/wewinur.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f06b18e44d7---wunoviwox.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/28077040682.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/bba1eb888b04fe3ed3b16df01847b22c/jinibilobon.pdfIn PDF document text
    • http://hinodanang.com/uploads/image/files/venut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=wetland+delineation+manualPDF 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_off0000b836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB836 15408 bytes
SHA-256: fcb6e5e4e895cc9aa8f2492071c03875edffbeaac9f6f7d254a928837140fc8d
font_01_sfnt_off0000df6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF782 10232 bytes
SHA-256: 37d5b871e90d997394038d3a9dd09b6da784a317db1fa5ca9f0930f868f02a39

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