PDF malware analysis — malicious · a46cc5e609dd4d30

MALICIOUS

PDF

25.7 KB Created: 2010-08-29 16:19:36 Authoring application: styeZek colSnap

MD5: 56e0f7b015c516047b76eef6d7553734 SHA-1: c1bbfc539e7396c2b7eaf63427f01ba7e51d6fc3 SHA-256: a46cc5e609dd4d30f093e5f6948ae367d0cc94e9067e265bf9d09479c7a03a24

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded executable scripts, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. The ClamAV detection 'Pdf.Exploit.Dropped-81' further confirms its malicious nature. The presence of suspicious embedded files, specifically 'embedded_file_obj0011.bin' and 'embedded_file_obj0014.bin', suggests they are part of the exploit chain. The script's exact function is obscured, but its presence within an XFA form points to an exploit designed to bypass PDF security measures and likely download additional malware.

Heuristics 7

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
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.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xDB	67 bytes
`embedded_file_obj0009.bin` `6b2260d3c78649345d3f0b850b831d545d33bb7017ccdf438cdfe1e9db7f2db2`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x167	294 bytes
`embedded_file_obj0010.bin` `5e850bba2a6c7be42461e665b5e82373d78214d7f5824a662d2da07c8d57b4cc`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x2D8	504 bytes
`embedded_file_obj0011.bin` `7d26b150a21d76667af729dacee107ea2afb3756ad9356224868878319c410a5`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x51B	23145 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 0x5FCF	323 bytes
`embedded_file_obj0014.bin` `6a34b324794c506fbd6dbfa05a2e584bfc5348352bd53c09255137659edd58cc`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x615C	165 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 0x6247	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x62DB	56 bytes

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