Malicious PDF — malware analysis report

Static analysis result for SHA-256 9be24ad0bff28bd3…

MALICIOUS

PDF

90.8 KB Created: 2021-08-23 13:33:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2da12beb8371ad2330ce3a5df87779b3 SHA-1: 3fc9b402406ba32f1b003f2722a5677712a65fba SHA-256: 9be24ad0bff28bd332a0b68855a2f8aca46199f6434acece0c772fc6291e3fa7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised CMS uploads or disposable domains. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/goruz.pdf In PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/lofisemufu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/2515a68a836b4c3a18982b2171f99961/timexopoduxukajebuxazug.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/260ac7eae47a97c79c2312f2d7954ec5/60008919175.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/4256e0f42e741e504d164477493bb7a7/95276656865.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/37424230027.pdfIn PDF document text
    • http://slsnn.ru/content/files/8229278530.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/41214884323.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/32134346068.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cd3d82caf---mikakalupidope.pdfIn PDF document text
    • https://digireg.es/upload/94496674608.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/78939108400.pdfIn PDF document text
    • https://enerjimakine.com/tsrm1/img/userfiles/file/26078691163.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31d84e485b---waloli.pdfIn PDF document text
    • https://x-software.cz/data/file/50612148690.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9de96e1cb4---27112880373.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/gerepaludokafikedimufugaw.pdfIn PDF document text
    • http://blackshirts1962.com/clients/f/f2/f245580d3072b78cda2271cf7a7e3f61/File/fozudovemumizite.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/gafevazexokuv.pdfIn PDF document text
    • http://kbchina.de/upload/3221460248.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/21b2b2d07a7861328c182b56365dfa88/34105593283.pdfIn PDF document text
    • http://zonazero.es/userfiles/file/78539776379.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/0fa7c40ee83a7aed4ca915193502691d/76161463123.pdfIn PDF document text
    • http://missinternationalbeauty.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/punebiwagekotog.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160825be88f32c---wisilip.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=chemistry+class+11+chapter+thermodynamics+notesPDF 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_off0000fa68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA68 10976 bytes
SHA-256: 80085c3030b80457dce0304efa06ed8571919b548447a0a0f30b731486b07818
font_01_sfnt_off000113c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C6 18040 bytes
SHA-256: 796b547b8ef010d1c31d49873f6946efa3a1a072d5b8746c6a2c3a57a81c92ce
font_02_sfnt_off000143ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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