Malicious PDF — malware analysis report

Static analysis result for SHA-256 46bdc60dbf0d2a13…

MALICIOUS

PDF

91.2 KB Created: 2021-09-03 17:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6381358277966277b867763cb0502e0a SHA-1: 3c86387bb0a42846d7618d3d60461508ced763eb SHA-256: 46bdc60dbf0d2a1335dcf1efa64910f18b45521cec494ac98f6618be74e702ad
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple URLs, some hosted on compromised CMS uploads, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL findings point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.funes.gob.ar/ckfinder/userfiles/files/63084570995.pdf In PDF document text
    • http://precedent.by/_newsite/images_from_html_editor/file/xoxuvunejapivefobebuloj.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/xatonagipa.pdfIn PDF document text
    • https://fivetc.net/uploads/files/bijenukoxinemujarav.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/531321e69c913875affeadcd595d2df1/12930804854.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1609211c30b935---63028071972.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/v1sp1cum3v5tvdnack9kih17et/dibuvomejagigepufobug.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/49708997324.pdfIn PDF document text
    • https://vitanov.rs/files/menijademixonupinot.pdfIn PDF document text
    • https://tyko.pl/userfiles/file/todeba.pdfIn PDF document text
    • http://domosplast.hu/files/file/90804961457.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/21386338118.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/96230502876.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/9524442965a882385a849d2b010ceabc/sosuji.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf70686e44---fobisukavenoborufejodi.pdfIn PDF document text
    • http://www.grupoaccs.net/ckfinder/userfiles/files/perefavukazogigixajuba.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16128b196ce8ac---lipurudimizarekalotike.pdfIn PDF document text
    • http://marketingnews.fr/images/file/44672225878.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/35548835468.pdfIn PDF document text
    • https://petala.gr/userfiles/file/wawukevidamewosebikexo.pdfIn PDF document text
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f68ba92d7e---poxavakumon.pdfIn PDF document text
    • http://guoyangmoju.com/userfiles/files/sipamafowakaxenoxume.pdfIn PDF document text
    • http://gyorszol.hu/userfiles/file/vijivojiwobuvusepo.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b56cab988e9---bedetufisa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pci+dss+pdf+downloadPDF 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_off0000ff68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF68 18284 bytes
SHA-256: f1089de296f1aa14c7aad9fd3e5c7dc7c9f90e14c203b88151d1351981ef9bdb
font_01_sfnt_off00012f56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F56 10372 bytes
SHA-256: 6b48737369629776d6f085c69d9b8bb7729ecf5aa9abd21d5113760e478aa407
font_02_sfnt_off000146f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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