Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1cefe3bb101c6b0…

MALICIOUS

PDF

29.1 KB Created: 2010-08-29 16:19:36 Authoring application: XuharyjucodYhu PeaCujozaywov
MD5: 7290730a2d0cf8b9dc7601fb4926fb53 SHA-1: 9659418b25182c874a9e3b9acae71b771f48db0c SHA-256: a1cefe3bb101c6b06527ebb1885f61693df08773fc9b5a3c53cc8f349ccea152
178 Risk Score

Malware Insights

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

This PDF document contains a high-severity XFA form with executable script, indicating an attempt to exploit a PDF vulnerability. The ClamAV detection 'Pdf.Exploit.Dropped-81' strongly suggests malicious intent. The embedded scripts are likely responsible for downloading and executing a second-stage payload, though their obfuscation prevents a more detailed analysis of their specific actions.

Heuristics 8

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • ClamAV: Pdf.Exploit.Dropped-81 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-81
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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://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 8

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51
pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x1AB 67 bytes
embedded_file_obj0009.bin
6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2
pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x238 294 bytes
embedded_file_obj0010.bin
afe1f9282b81e7edbceb73a799cdc21eb25def90ba66b03b2e70ec927bc67393
pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x3A9 592 bytes
embedded_file_obj0011.bin
0521888b72fea4ff509b2a5e1cb551b4a835b09d0a7dac6270953fc88e8587b3
pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x644 26318 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0012.bin
103d1e7983cf88bfacedddb4af33ffb5317d9c2c8b3e1bfd987b2c5d712bc985
pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6D5D 323 bytes
embedded_file_obj0014.bin
ec843eeed6c29b834cc1a5de17fdafb36a9cb04f11f0e6aeb9d8d945d3ee8702
pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x6EEA 162 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0015.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876
pdf-embedded-file PDF EmbeddedFile object 15 at offset 0x6FD2 77 bytes
embedded_file_obj0016.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a
pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x7066 56 bytes