Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdac0fdec268364…

MALICIOUS

PDF

106.0 KB Created: 2021-03-17 12:38:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f12ce8b5b90359c5c83409665d000444 SHA-1: d2ee394a77b15dbfc6c7bd0d02578784ac4ddfb1 SHA-256: ebdac0fdec268364a7b8697d72d292289a4b1774f078fc0f020aa07cc537524a
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score. The presence of a PDF link farm with 30 external links, one of which points to 'https://kuzutuzo.ru/wix?keyword=mp+3+d%25C3%25B6n%25C3%25BC%25C5%259Ft%25C3%25BCr%25C3%25BCc%25C3%25BC+h%25C4%25B1zl%25C4%25B1', strongly suggests a phishing or SEO spam campaign. While no scripts were explicitly extracted, the nature of the link farm and the detection names indicate malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/wix?keyword=mp+3+d%25C3%25B6n%25C3%25BC%25C5%259Ft%25C3%25BCr%25C3%25BCc%25C3%25BC+h%25C4%25B1zl%25C4%25B1
    • https://keboxatoxumire.weebly.com/uploads/1/3/4/5/134591907/5264183.pdf
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/7636036.pdf
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/binepumas_kosirotajuvinuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/luborinizu/xigubikavetafurapubumujin.pdf
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_e58de03c15af46938fcbe7e968ca4ee8.pdf?index=true
    • https://aee666f7-65d2-4416-8089-42e5bd85255d.filesusr.com/ugd/c4036c_e997b73487bf49a28d156d94306dd021.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e5eabc7b-9629-42ae-9b7b-fce49522a57f/jubimuvolexawigetuso.pdf
    • https://6f847715-c85a-45d9-ae5c-7c68cc800588.filesusr.com/ugd/6e100b_ea2014f590e24bfca6dfa4e2868b7242.pdf?index=true
    • https://uploads.strikinglycdn.com/files/09b54793-19b5-4163-b300-539b24eae550/kuligoxikokara.pdf
    • https://ddb1515c-011f-4d6c-9a6c-b305a2039a85.filesusr.com/ugd/477ac5_affade366fe64e6f825c3dd6b5e54811.pdf?index=true
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_baaa81bccb4e4acf9441b135fce84ba2.pdf?index=true
    • https://3437305d-a3f4-4f94-9a63-846dd410f5be.filesusr.com/ugd/ffe76b_8ecf875e959d41b28a28239ac181e6f8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5cdd3eb1-e10c-4688-9e32-40261769413e/formula_excel_convertir_mm_a_pulgadas.pdf
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_d908a578a4d2403ba21f2b96f072a914.pdf?index=true
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_2b00e50b57d24de5a6a6fbfe40e17be5.pdf?index=true
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_f978a1f479d44e78b60216ce6101e609.pdf?index=true
    • https://7d7e9a41-1eea-4c72-a0b8-c0e3d642de37.filesusr.com/ugd/513cfa_eb464621b9d846648707ef93a4ed20ba.pdf?index=true
    • https://uploads.strikinglycdn.com/files/54760f13-150a-49b0-89b7-8bbd11b00ec7/what_are_two_needs_of_all_living_things.pdf
    • https://s3.amazonaws.com/mojivikapeti/arabic_alphabet_worksheets_for_grade_1.pdf
    • https://s3.amazonaws.com/xulikamul/ukulele_bodysurfing.pdf
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_ffa8344cf3fe4ea2aa172bc4b720681f.pdf?index=true
    • https://s3.amazonaws.com/nuxomigo/nipel.pdf
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_2315bc1f7a7f4b2794765ea281cc5804.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3c4.bin
9c5b55bda54f28c28b0851d126dbf1d58b27f4618fb84302dcc585c45eb28591		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 33180 bytes
font_01_sfnt_off00015ae1.bin
00ba30f8db888cccf2d67026ba2e9ed9d9e3e9b4c74a076742371289bd09af7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE1 5532 bytes
font_02_sfnt_off00016d49.bin
8cd2991ddd6729277448417cd552d78959fea09c059f38acf908ec66466587f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D49 15760 bytes

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