Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddd683f4135f1cd…

MALICIOUS

PDF

111.3 KB Created: 2021-03-09 10:10:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e3406f1c13569d0ef96616002df031ee SHA-1: 7b616bc07dcbde5d78e5cc8db0491c9262e8529a SHA-256: bddd683f4135f1cd676ecea89556855559dcee5ad6c2227eefe107cf19212752
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'kuzutuzo.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the ML detection strongly suggest it's designed to exploit vulnerabilities or trick users into visiting malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=que+es+la+musica+moderna+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447662/normal_6007df1137ca3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392452/normal_5ffaa3eb79318.pdfIn PDF document text
    • https://cdn.sqhk.co/vofaruvukuk/ggWHTsl/2750774708.pdfIn PDF document text
    • http://dirozigumifew.scienceontheweb.net/how_to_train_your_dragon_3_full_movie_in_hindi_download_filmyzilla.pdfIn PDF document text
    • http://kuvenumine.mygamesonline.org/janekofo.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/shbgdID/88347273095.pdfIn PDF document text
    • http://digovin.getenjoyment.net/the_two_brothers_story_class_8.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/what_is_the_definition_for_survival_of_the_fittest.pdfIn PDF document text
    • https://cdn.sqhk.co/jomutepe/ZJheVjb/tawatadof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rukosivujuxu.atwebpages.com/workforce_tile_cutter_thd550_owners_manual.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/how_to_get_iphone_11_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/we_were_liars_summary_chapter_11.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/boy_scout_handbook_norman_rockwell_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/99846173235.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/cuneiform_bone_fractures.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16791 5164 bytes
SHA-256: 5c67cd5dd778c10f4b79fb3cf40ab0798ab2fc8891b8eb68db2b14099bbaabf5
font_01_sfnt_off000178f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178F8 12216 bytes
SHA-256: bf42c5aed3df5889515edbdc098b0d7238a76171611d5996be993f008a52874a
font_02_sfnt_off0001a062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A062 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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