Malicious PDF — malware analysis report

Static analysis result for SHA-256 899359e17fea55fe…

MALICIOUS

PDF

73.6 KB Created: 2021-07-14 08:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3bfc27e64f9306cc33847ba0eeedd78a SHA-1: 10341ee696d73424ec64273b561c5adada269c71 SHA-256: 899359e17fea55fe2dae24ddaabbf0734a9a95b9405e07eb651598455beccb38
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that, when clicked, leads to a URL disguised as a movie download link. This is a common tactic for phishing or distributing malware. The ClamAV heuristic also flags this file as a 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3118

Heuristics 4

  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=the+boss+baby+full+movie+online+free PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec88524a8bde38c34550c6/1626114130739/minecraft_one_block_skyblock_map_download_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b6676d117d6eeca25d42/1625798247732/69891726000.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC320 14952 bytes
SHA-256: e5281264f2b53433d404d302b5d816f815d292a425c576c7b689488dc13b084f
font_01_sfnt_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 10764 bytes
SHA-256: a9de115d61421c381d4c0527d0b20b11acf4e24c2707bbbf6d957722ea90e8bc

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