Malicious PDF — malware analysis report

Static analysis result for SHA-256 97dd7dc8e427e551…

MALICIOUS

PDF

74.3 KB Created: 2021-02-25 15:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6330538b8575377d737667deaa653758 SHA-1: 52e173dbe460fba1b2daf34ead3081afa85a2385 SHA-256: 97dd7dc8e427e55147add8541bee510516945d04a4c64c5c8b2caa6f3fe4c8ac
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, specifically to `seumenha.ru`, suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are commonly used to redirect users to malicious sites, potentially for further exploitation.

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://seumenha.ru/wix?keyword=robert+c+johnson
    • https://cdn-cms.f-static.net/uploads/4403557/normal_602e0e4469db2.pdf
    • http://xiwotafajiloluf.22web.org/5911349307.pdf
    • https://cdn.sqhk.co/kosojilufut/e4Ihcg7/94467128556.pdf
    • https://dominisu.weebly.com/uploads/1/3/1/3/131379959/5679670.pdf
    • https://cdn.sqhk.co/jotoselu/jbnjfih/jazz_free_internet_code_2020_april.pdf
    • https://woxufojobufuv.weebly.com/uploads/1/3/0/7/130739326/2418043.pdf
    • https://cdn-cms.f-static.net/uploads/4422637/normal_602984d5393ea.pdf
    • https://wikifepum.weebly.com/uploads/1/3/3/9/133986434/4118024.pdf
    • https://static.s123-cdn-static.com/uploads/4418381/normal_5ffb22e113f06.pdf
    • https://cdn.sqhk.co/gesaxamadew/5jicgjb/32956393198.pdf
    • http://jinokawobusuzi.iblogger.org/deed_of_assignment_of_loan_proceeds_form.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/baposivarabuj/58592377463.pdf
    • http://magajavopisili.epizy.com/94828144269.pdf
    • http://lugixevizopef.epizy.com/ammonium_bicarbonate_safety_data_sheet.pdf
    • https://s3.amazonaws.com/xeponodij/what_is_included_in_decision_briefings.pdf
    • https://s3.amazonaws.com/xisefowu/smart_android_tv_box_media_player.pdf
    • https://s3.amazonaws.com/voxulija/54407708656.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc4a.bin
75f736c68104a3af3fe0ab661055f01c5ce8df1fc8313021e9cfbdf089ae9105
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4A 4608 bytes
font_01_sfnt_off0000ebe6.bin
5ed09e24394bdeb5926d20469536b0a4cd4a3862549cc4a4872e8cddbb95f69d
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE6 9888 bytes
font_02_sfnt_off00010dd4.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD4 4324 bytes