Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f50786dd27030c…

MALICIOUS

PDF

72.5 KB Created: 2021-02-12 06:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: afe8ccf39ff9b779015d469070361a0a SHA-1: e7e74d2a313deb1a7c4f93a071857226cb7d1dfd SHA-256: 91f50786dd27030cf083ff7f94fb0d5406b3e792a63603f93b5d6514892a997b
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified by the PDF_URI heuristic. The ML classifier and ClamAV detection strongly indicate maliciousness. The document body, though heavily obfuscated, appears to be a lure related to trading, suggesting a phishing or social engineering attempt to trick the user into visiting the external URL.

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=trading+price+action+trends+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426571/normal_5ffa3f0dcdf5f.pdfIn PDF document text
    • https://cdn.sqhk.co/jidelugob/acicifF/xodujuxopaxesi.pdfIn PDF document text
    • https://cdn.sqhk.co/satovepato/ggX5ihQ/covid_alert_nj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421342/normal_600adedd1785e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380229/normal_5ff4f909cf0f7.pdfIn PDF document text
    • https://cdn.sqhk.co/sopaluwokaja/ejhsadz/gikatodarudefezajunarexo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_6023fafd23c5d.pdfIn PDF document text
    • https://cdn.sqhk.co/zenekukera/NhiVMgd/lulepexoka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384482/normal_60242edb8561e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417045/normal_6025f1756e271.pdfIn PDF document text
    • https://cdn.sqhk.co/juduxijumijo/egeX8SW/icy_veins_fury_warrior_classic.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jozaponi/alone_together_fall_out_boy.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/difference_between_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/norolonijaxogixekapufir.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/the_human_centipede_2_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/56745043171.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B8 5240 bytes
SHA-256: 0f9fbefceb3a0b2943a5b1820e607f297ab5a9b5443b36709b8a7122c0bbeca2
font_01_sfnt_off0000f399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF399 9620 bytes
SHA-256: 47dc67de891070e809ba978a8220cff5a9865eba8748c30cd6b18460e08b9dee

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