Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a413900ca7e3e6…

MALICIOUS

PDF

43.1 KB
MD5: 5125e2b10d2d29b5690647db95fdb17c SHA-1: 20da1c68717bc6d18625fbde6908e09e410dc88b SHA-256: b4a413900ca7e3e63c0aa47dd6ab6752bdabc9b7907ba22d608ec962e102904a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detections indicate this PDF exploits a known vulnerability, likely to deliver a malicious payload. Multiple embedded files were found, one of which is significantly larger and likely contains the exploit or secondary payload. The presence of XFA forms and embedded scripts further supports the exploit vector.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
  • 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://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 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
813932ea92c9da26d2ebeaa7568e8ef3ffdbcf1b00fed5b01a4558e256975198		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 683 bytes
embedded_file_obj0010.bin
e1ab66598406464785df1b7c3e4218452dce39c816aca3e1a181e312cbe8a05c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x458 93 bytes
embedded_file_obj0011.bin
ecf5c48edf23b6173bd563e27e5f54a78c8abd1ada7c6f43ac7d499246e6ef95		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x500 439 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x702 389 bytes
embedded_file_obj0014.bin
3b6c38f36fba184cf331ecd86635b64eae15da0e55c77994b6b1456b1aaa9bf9		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8D4 41051 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA979 147 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.