Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed4837e321edf19b…

MALICIOUS

PDF

67.5 KB Created: 2021-09-17 20:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f0ac01c72a36423b94c72b262b5fe13 SHA-1: fb3dcd96de4e4924276e8565fe5e54cdd86fe249 SHA-256: ed4837e321edf19b5387406466c8899e34074bc0ff5b36a857d970b72ba32bad
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on compromised websites or disposable domains, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://medvor.ru/uplcv?utm_term=download+rlcraft+for+android
    • http://hanart21.com/files/userfiles/file/75913597570.pdf
    • https://artedeeducar.com.br/ckfinder/userfiles/files/26413310698.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9fed7afd3---11298240046.pdf
    • https://canionglobal.com/FCKeditor/file/20278598096.pdf
    • http://philipsphotographystudio.com/54956505355.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161424ec8f3d6b---juvupeb.pdf
    • http://czyxchem.com/upload/files/63413448036.pdf
    • http://sjar-tech.com/uploadfile/file///2021091603185754.pdf
    • https://ixiu-23.com/uploads/files/202109170103082009.pdf
    • https://dom4m.by/userfiles/files/84472098990.pdf
    • http://tnhmc.com/userfiles/file/66171818151.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/5860251e7718892cee7b2891c875278d/vikotiwijomidegusavopo.pdf
    • http://nguyenthaotech.com/upload/files/53023464291.pdf
    • https://arichaindia.com/userfiles/file/67765121258.pdf
    • http://bezpiecznamlodosc.org/files/file/gavegibodubudusuzo.pdf
    • http://teplorium.su/userfiles/file/sudinolejumino.pdf
    • http://hoteldanang.com/uploads/images/files/55510473716.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/wapovimijefizeb.pdf
    • http://thietbibepnhahang.net/media/files/85709836957.pdf
    • https://cyc-catering.pe/disac/userfiles/file/69213120580.pdf
    • https://basundharamart.com/userfiles/file/86008333104.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/a0f5c5ba41752017b2fb330bf9a75abf/39609035235.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad15.bin
cc2b2ff5872361b384993308a5532df3dd4c933686b0357f64c73bf692a44da5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD15 10256 bytes
font_01_sfnt_off0000c441.bin
e56462e6568f4cff4792240170577f8b7337fa21610b3d63ded0e46dfa189396		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC441 14500 bytes
font_02_sfnt_off0000e8a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A7 16792 bytes

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