Malicious PDF — malware analysis report

Static analysis result for SHA-256 00effd0c57a24de3…

MALICIOUS

PDF

50.5 KB Created: 2020-04-08 11:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b46bd652eba93210b784f5a040b7e93 SHA-1: 70e6ca5622ab3aaba5e0e7a31da4d7b8a2e0b322 SHA-256: 00effd0c57a24de350c95986efdb374c4a77e89ca3eef2294ec84a0331211347
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating it functions as a dropper. It contains multiple embedded URLs that likely serve as download locations for further malicious payloads. The document body, though heavily obfuscated, contains references to these URLs, reinforcing the dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-9213652-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9213652-0
  • 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 http://tinkascafe.com/uploads/1/3/0/8/130814009/130814009.html#jon+duckett+javascript+and+jquery+interactive+front-end+web+development+pdf
    • http://mrrandom.org/uploads/1/3/0/8/130814187/zevodijopij_bozupakazob_junerejamivaku_tovimokiwe.pdf
    • http://strawberrycookiekid.com/uploads/1/3/0/2/130287882/4472213.pdf
    • http://jlfunkllc.com/uploads/1/3/0/9/130968967/6480670.pdf
    • http://activedomus.org/uploads/1/3/0/6/130603929/pawoger.pdf
    • http://kylielyall.com/uploads/1/3/0/4/130488543/4430886.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008391.bin
fc556bcb9ec2cc22e1e74d7360488dc2980dfbe756d5baf73a36f6819b58bd39		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8391 9296 bytes
font_01_sfnt_off0000a701.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA701 16036 bytes

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