Malicious PDF — malware analysis report

Static analysis result for SHA-256 117f3d520b819e7e…

MALICIOUS

PDF

85.6 KB Created: 2021-09-15 20:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61e7cd6405c29fafc450626d708739f5 SHA-1: ece6b382471289c8f52a8ae1fb159c85df2c07d7 SHA-256: 117f3d520b819e7ebd42a1db60265a6f16e0d844f167f493ce5d43195ffb5689
196 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, instructing the user to install a browser extension or update. This is supported by the 'SE_BROWSER_INSTALL_LURE' heuristic and numerous embedded URLs pointing to potentially malicious or compromised sites. The ClamAV detection further confirms its malicious nature, classifying it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the overall pattern suggests an attempt to exploit user trust for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://garglob.ru/uplcv?utm_term=chrome+android+developer PDF link annotation
    • https://vnsteeldetailing.com/UserFiles/files/gamololutopipaseka.pdfIn PDF document text
    • http://ryouhurt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18552167934.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/tugebasow.pdfIn PDF document text
    • http://glovimex.com/uploads/ckfinder/files/dijajexitanasonibilete.pdfIn PDF document text
    • http://knipia.com/userfiles/file/2733556376.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/37640950789.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/abab3d92d2ca3875bc77a5193d814b5a/90467276296.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/a2od08appeuvc3gc7o205r8gq5/51344967278.pdfIn PDF document text
    • http://sromedical.com/file_media/file_image/file/gisaletut.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/42132609784.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/31247210274.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/22178010394.pdfIn PDF document text
    • http://www.ks-klinika.ru/ckfinder/userfiles/files/juluporaj.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/lavamujer.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/zutemimemato.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/pabiladofe.pdfIn PDF document text
    • https://campfun.myhost888.com/upload/ckeditor/files/bujoxajemewusekabovorizu.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16138d7395b184---sipoviwojigidinovaw.pdfIn PDF document text
    • http://aprt1day.ru/file/46209291937.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/gopulomopaxefobagutavuvi.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/40449452804.pdfIn PDF document text
    • http://dentherapia.hu/files/file/ruvosezovusitemo.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161344e8e69fba---94159623859.pdfIn PDF document text
    • 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_off0000ec34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC34 17544 bytes
SHA-256: 03e3de4aeb3253c07a8cfccb4e6d97d65606ea19bdded57aca3bc34bff9dd347
font_01_sfnt_off00011990.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11990 10488 bytes
SHA-256: 8edc27b924297deccbc14aa35a924cd1272f1e9cfa0f2f1459b3aeeafe279f5d
font_02_sfnt_off00013129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13129 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.