Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb2c9ee8f9a58ee…

MALICIOUS

PDF

109.7 KB Created: 2021-07-02 20:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e0b9a32b8b9b5bf2261a03f487958224 SHA-1: 0d2bb8e6386aa482afd98c472a1eb0f760d19ea4 SHA-256: afb2c9ee8f9a58eecdc6cfed0a26854dcba98bd4ae6b094eb7873cd3be67e374
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content. ClamAV detection and ML classification strongly indicate malicious intent. The presence of multiple PDF files hosted on various domains suggests a campaign to lure users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/3023a643511fb261e7e938c9fb929307/91130129652.pdf In PDF document text
    • https://mimpishio2bet.com/contents//files/21903870489.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/990fbc81f2854f5f1023a39fceffceda/98872794929.pdfIn PDF document text
    • https://readandenjoy.ae/userfiles/files/gibiwirukigagoxogifu.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab58b505e8f---12186741468.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/60431145839.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/3002812ca17eaa6e869c160f448d570e/marot.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbab0947052---fopamofinelemu.pdfIn PDF document text
    • http://simonide.org/userfiles/file/sufiwebivenikum.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/096264ee591e3a7f56c2d4e958fe1bab/jedafifi.pdfIn PDF document text
    • http://rencontres-icare.org/userfiles/file/29302862678.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/52a062653c76066c7ea2864e44d4ce23/jotanodavejit.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/uua2enamq2csfqj5970qisn3qg/2491320526.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e42140c357---ruwaw.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/ced025f56237688e49f520ec020f0b54/gujul.pdfIn PDF document text
    • http://writtenmail.com/upload_images/file/60060518410.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/06cdd2b86e7deed595ea726ba4934523/94051236997.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081a558c1cce---misubenavodek.pdfIn PDF document text
    • http://centrumbiznesurawicz.pl/userfiles/file/6061737009.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084fdd4b45be---48538432827.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/ccfe5e69e067ed8d8042061abe92e11f/zekasoralur.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/tolik.pdfIn PDF document text
    • https://kham.vn/userfiles/file/9979740401.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=rembrandt+the+anatomy+lesson+analysisPDF 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_off00014b3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00016355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16355 10812 bytes
SHA-256: 24a2f7a4e357c0ef54bfca7b671dca029af4b6704c56bbc664e6b8d47a20e3fd
font_02_sfnt_off00017c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C06 17544 bytes
SHA-256: 25c777d9f253c46381082dfca18957cf9c76890c15996a77ced4809a6ce5a0a7

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