Malicious PDF — malware analysis report

Static analysis result for SHA-256 545a20f635f56f66…

MALICIOUS

PDF

10.3 KB Authoring application: Fzlfrlaujg Uqcaktqgm
MD5: 82b53a155fd55dda583f9f81620f8ff5 SHA-1: 8de3637a802f9ecd8c505b74b1db2d2b296a772a SHA-256: 545a20f635f56f66b5d81d5c8bfc5b7341351cf637a07a74f0f8e63cc50bb5d9
98 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The critical ClamAV heuristic 'Pdf.Exploit.Dropped-87' and the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' firing indicate that this PDF contains an embedded script designed to exploit a vulnerability. The embedded file 'embedded_file_obj0008.bin' is likely the malicious payload. The presence of a suspicious URL further supports the delivery of a malicious payload. The script's obfuscated nature and the embedded file suggest a downloader or dropper functionality.

Heuristics 6

  • ClamAV: Pdf.Exploit.Dropped-87 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-87
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://www1.personalafsentinel.de.lv/?6tqcs7=Wtfex7Cc6MqY6NjSnqGYnqyL4ujVq5adbKmllqdwqZnVmePhnp2UmaOWn6Wipp2SoueulKNnp4vT1dHgnr61sZnV19imoYvfWg%3D%3D&quot
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
abe3eb99435efda2dc5e8e18090eca3b0832227fad91a1dc202dab634cc20d20		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x141 9450 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 long base64-like blob(s).

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