Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19876f129ab5fd7…

MALICIOUS

PDF

91.7 KB Created: 2021-07-13 02:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c45838851ac1da30d99b9a04ccf81e5 SHA-1: 8b75bbb9c84ab9f165fa29991697686d807bc7e0 SHA-256: b19876f129ab5fd7bb24e5ff4bd1d985513b5be164c60b7467fd7a9cb4904a80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF_URI heuristic indicates an external URI was found, which is a common technique for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6187

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/gPkW7oTCsL0/square?utm_term=how+to+get+geralt+gwent+card
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecc96749c8ff6678156c02/1626130791136/80843627621.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e957a20a287971af9b8d44/1625905058877/fozedugere.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c1fa7e45264421f786ff/1625801210975/provincial_toxicology_centre.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_off0001070c.bin
0fee775fd19e2cd4a1cd6d33f9f47a9fb9b72f0dd0040218d00b01b77fbb0b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1070C 17256 bytes
font_01_sfnt_off000133e4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133E4 16792 bytes
font_02_sfnt_off00014bfb.bin
81ac93c14f4fb1488e64ab10752ef7e9732be82050b1804f963a9d21fe3d597e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFB 10364 bytes

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