Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3dae3764d79442…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 06:48:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3847541b0fcb2324e54091409b6d3ee3 SHA-1: 7dd51ecf0ea697c9c0e7e49aae00806fa10bc50e SHA-256: ba3dae3764d79442e0987e78b0f5fb82de3375480ee3584669222f74154151b2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to 'https://nipisod.ru/strik?utm_term=note+3+neo+price', which is likely a phishing or malware distribution URL. The document body, though heavily obfuscated, contains text fragments like 'Note 3 neo price' and references to 'wkhtmltopdf', suggesting a lure to a potentially malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=note+3+neo+price
    • http://getodupelipod.iblogger.org/libro_vejigantes.pdf
    • http://pixerofojoka.22web.org/spring_coloring_worksheets_for_preschoolers.pdf
    • https://cdn.sqhk.co/kofatuziwu/ib6Kgdm/kipivosadudipitenidosivag.pdf
    • https://cdn.sqhk.co/tuwagezo/zgcLYgj/40599458328.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fewunadupop/nj_attorney_general_use_of_force_report.pdf
    • http://tuvojiteziw.epizy.com/67613807100.pdf
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_a03fa032677c4f5b96d286eb53bce579.pdf?index=true
    • http://timawerana.epizy.com/value_investing_stocks_right_now.pdf
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_2d2094f8e5254369a1dad49df3d6d033.pdf?index=true
    • http://savipifuza.rf.gd/59581471024.pdf
    • http://lujopuz.rf.gd/do_you_have_unlimited_hotspot_with_unlimited_data_verizon.pdf
    • https://uploads.strikinglycdn.com/files/d9846a79-1b47-431d-8e56-7c8d931085f1/vupobo.pdf
    • https://s3.amazonaws.com/dowesitobuga/the_martian_movie_download_in_hindi_hd.pdf
    • https://uploads.strikinglycdn.com/files/9f5abd78-72d1-480a-8112-b0388a1468b9/jazimubali.pdf
    • https://uploads.strikinglycdn.com/files/6fefe9d3-4a02-43bf-a07e-06cc5fd9d698/95244551067.pdf
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_8e27815a54464286a86f5e28b9d4e8e4.pdf?index=true
    • https://s3.amazonaws.com/rizijubovapuk/86490097486.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed08.bin
f89c1120ad86a40e18b03e4d24ee2d3ff5f91235c3dfb9d9384d3c7e6cb99ed8
pdf-font-stream PDF embedded font (sfnt) at offset 0xED08 4640 bytes
font_01_sfnt_off0000fcf1.bin
5ed0cb5bb595126552688d296ccf11d70c3b4508ca18f25ac45d0093fa0c2aa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF1 11820 bytes