Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a5b9cdef458e2c…

MALICIOUS

PDF

81.3 KB Created: 2021-07-12 22:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6c3ad0eb023b3d0753d86ef4d816f840 SHA-1: c0ada1e1a4e3c83165ec054bbe2bd1aeba78bc1f SHA-256: 60a5b9cdef458e2c14cf0a8c168404187d0fab62064183fbd48107a847c8c958
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, although some are marked as benign, suggests a potential for downloading secondary payloads or redirecting users to malicious sites. The PDF_URI heuristic firing further supports the presence of external links within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6198

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/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=computer+based+project+topics
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e93407e51f1f218d6aa342/1625895943586/group_2_old_question_papers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7d33580504e0a7768f6dc/1625805622207/plate_tectonics_test_study_guide_answers.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec84985f604029b991a7d2/1626113176892/stock_price_volatility_meaning.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcfc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 16792 bytes
font_01_sfnt_off0000f513.bin
e5f8c26576386d81210ddb6e4c4f7ea689d260683ce3166f8d26bb6dcbff3dbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 10924 bytes
font_02_sfnt_off00010e2c.bin
b289dfe1162ee281a9ef9498639704899d71f3ab80b10ff173041471a38d5f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E2C 16720 bytes

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