Malicious PDF — malware analysis report

Static analysis result for SHA-256 d633ebf115dc43ce…

MALICIOUS

PDF

89.4 KB Created: 2021-07-17 05:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 80c5f82e5ea6792b75ae0000e0b47fd9 SHA-1: b78e19d0c98d63ecb3d013e50f0d168c9a383d4f SHA-256: d633ebf115dc43ce95e627a18c27f7c0141280dc0951b69b870f345d5b6905e9
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV. It contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to potentially malicious sites. The PDF structure and embedded content indicate it's designed to exploit vulnerabilities or trick users into downloading further payloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4280

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://feedproxy.google.com/~r/sq/ugae/~3/iXsW93xxTQA/square?utm_term=in+the+strong%27s+concordance
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8e35db9b95949b65b6c40/1625875293771/programming_with_java.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1f54fc97a2d35ca7be2d4/1626469711874/litokupujevika.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee24a07c5bce1f334b2301/1626219680917/class_11_accountancy_ch_5_solution.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f0e9fdfcdff1298e526371/1626401277493/state_owned_companies.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabb.bin
42d5ef338b9f73d647f6b037e967253a9ec180639b3f0fc3791b876e64ab309a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDABB 21036 bytes
font_01_sfnt_off00011042.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11042 16792 bytes
font_02_sfnt_off00012853.bin
3949ddc16ec18840bdad3b78a1e9e11cf181fdf1d1685081b0635edf23fc2585		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 16728 bytes
font_03_sfnt_off0001400e.bin
9f4130fbc695f2835ce854813400ab0bb7eed79cee9c00625b3ae6e7e1b14332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1400E 10496 bytes

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