Malicious PDF — malware analysis report

Static analysis result for SHA-256 039d95e4baf675fc…

MALICIOUS

PDF

81.0 KB Created: 2021-07-18 02:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 55dec738f96a14f1d54025de6f02e4b7 SHA-1: 1fbcca42b7c4cfa4bc9a84de69d31120ba32ef78 SHA-256: 039d95e4baf675fc38ac17254be2ac878e93debb6a7238891852e63d8a488fb6
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 PDF contains embedded URLs, one of which is flagged as a potential lure. While no scripts were extracted, the presence of embedded URLs suggests an attempt to redirect the user to a malicious site, potentially for phishing or to download further payloads. The document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/gPkW7oTCsL0/square?utm_term=all+the+devils+are+here+louise+penny+reviews
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e90bccc14ff043cd5c0b06/1625885645009/13899348072.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2962c1ad9bf1c32ac156f/1626510892136/ml_emote_injector.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e904598fb24157da6eeb88/1625883738055/62792892960.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f23ad5efed6b61d47576f4/1626487509229/domain_model_made_functional.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_off0000d639.bin
26be2281c48a6875ba03e42bf70e1551f676df037cdeb0fc7e4b977c0e429925		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD639 10836 bytes
font_01_sfnt_off0000ef48.bin
0c590c6fd1f1f678922b24b11384d3e66ef0db3e8a1122a036a280b8ba081fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF48 18436 bytes
font_02_sfnt_off00011fe2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 16792 bytes

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