Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a58af6a81b90f…

MALICIOUS

PDF

74.8 KB Created: 2021-07-20 02:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53154705a1db2a504d48315257b467e4 SHA-1: fc8e9632fcbeaceda5ab8ad64fd6f2941249c4ac SHA-256: 2a3a58af6a81b90fd271485902f82a698f76648af859d0668d1d7eb09759222a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains embedded URLs that likely lead to phishing content or further malware downloads. The presence of PDF-specific heuristics and embedded URLs suggests an attempt to exploit PDF viewers or trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/sq/ugae/~3/ZV5PD9BTPXI/square?utm_term=compile+pdf+files+online
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f5489b9c57c24939526ed8/1626687643995/tixiwumexilinikarokirufus.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2ce43699a8678c5748be5/1626525251674/highly_significant_p_value.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec91ff1951226b8b8bf15b/1626116607889/what_is_3ah_battery.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_off0000c5f2.bin
bc5d730cf756922efb513a6db390f31bcd3f24c497a3cb36cdd25ac06a0aa0c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 10328 bytes
font_01_sfnt_off0000dd28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 16792 bytes
font_02_sfnt_off0000f53a.bin
5077ab3cbf39695793df7ca4deac234070f2eaa352bc6ddcf94ca20624727a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 16320 bytes

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