Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec3ab26364d99a56…

MALICIOUS

PDF

72.7 KB Created: 2021-09-16 13:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 190fa47a19582c37fb37c596cbca12c3 SHA-1: 9dfef63b0a9e42b32abc207551a99d2f965470ff SHA-256: ec3ab26364d99a56e09d9fb2325e92f57630d26cef757b2a952003362d4ba1da
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the presence of numerous embedded URLs suggest a phishing or malware distribution campaign. While no scripts were directly extracted, the nature of the embedded links points towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chambres-hotes-aube-bleue.fr/userfiles/file/zavofesozipip.pdf In PDF document text
    • http://entryexpress.online/chapter_images/files/58891318346.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/34475119240.pdfIn PDF document text
    • https://e-motorcycle.tw/upload/emotorcycle/files/sibuwe.pdfIn PDF document text
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/motepigoleletewu.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/47847135670.pdfIn PDF document text
    • http://praguetransfer.com/files/file/34313564539.pdfIn PDF document text
    • https://hoanghaie.com/Images_upload/files/mifezosimaxonamu.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/16285472748.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76570765306.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16134f6f452e10---nusurup.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/fizugekebijolafesifik.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/33646097244.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/faribeg.pdfIn PDF document text
    • http://samocvet.org/foto/ck/files/13510762608.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/161320f99477f0---zezinipuzamikaviluvizunam.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/31957842384.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/7383857d34c18a2a6a7d8cffd7e67082/70677435447.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/zarofovolixagirenu.pdfIn PDF document text
    • http://hybsch.it/upload/file/nutaganatawosixuzibewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=lego+ds+romPDF 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_off0000bc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC0D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41F 16932 bytes
SHA-256: 9eb5f3f3f2654faf892ea1594a87a5b5c255a149c0064c3fab6e74c6b2e1c4a5
font_02_sfnt_off0000ffca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCA 10048 bytes
SHA-256: 38785b853a106d5d5e9a486149b25b8ef80b9a1de5b8e804db83457086f03cba

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