Malicious PDF — malware analysis report

Static analysis result for SHA-256 19c0d9b3832a9647…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 13:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd00b9d1af85193cb0d331f0de71a5a7 SHA-1: bbb0a6b6f83180f8f48e070e2659f33c7911d530 SHA-256: 19c0d9b3832a9647796c309492ada4b53e7235b8d881b5c51a61af3a43e84b75
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 an external URI pointing to a download-related URL suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a social engineering attack designed to trick users into downloading further malicious content.

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=whatsapp+download+apk+2020
    • http://sunny-web.ru/33081253639mlsl8.pdf
    • https://cdn.sqhk.co/kikolibub/coCijfW/football_manager_2019_macbook_air.pdf
    • http://cmbespaceclient.xyz/fipijexodexamugujyxu8q.pdf
    • https://static.s123-cdn-static.com/uploads/4391623/normal_5fec594b67941.pdf
    • http://sodalabs.club/44096778525s68mx.pdf
    • https://static.s123-cdn-static.com/uploads/4450733/normal_5fcbdefc47342.pdf
    • https://cdn-cms.f-static.net/uploads/4402722/normal_5fd24051b75c2.pdf
    • https://static.s123-cdn-static.com/uploads/4379856/normal_5febc109aebaf.pdf
    • https://cdn-cms.f-static.net/uploads/4450884/normal_6043957213d4d.pdf
    • https://cdn.sqhk.co/fonixoligem/BkqPjic/instagram_followers_gain_app_download.pdf
    • http://nafarami.medianewsonline.com/47396711073.pdf
    • http://teagreen.space/dafizafojawadiy5vw0.pdf
    • https://cdn.sqhk.co/rasepotobami/iija3rI/dragon_skyrim_locations.pdf
    • https://cdn-cms.f-static.net/uploads/4455642/normal_5fd7482ca7315.pdf
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fd663cba677f.pdf
    • https://cdn-cms.f-static.net/uploads/4367299/normal_601e412c53a3d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vorasatijede.rf.gd/40522931810.pdf
    • http://jotunoxageleza.rf.gd/nip_fab_glycolic_fix_exfoliating_sheet_mask.pdf
    • http://rujunigowe.epizy.com/61819289240.pdf
    • http://jotudokizer.onlinewebshop.net/how_to_write_a_tv_news_report_example.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_off0000f0c3.bin
a0a470e8725ca389aa77f1163967e0e319da4d0085a4d79079e8edabdac0963e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C3 5396 bytes
font_01_sfnt_off00010335.bin
90f366030e1aa6697708ab033d6c6931d1c163944f1987d0b880dfa11d7bbce0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10335 10764 bytes