PDF malware analysis — malicious · 78a7fc1731bcdca1

MALICIOUS

PDF

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

MD5: 43fc0802b3d37118ce26af3832a79692 SHA-1: 44a5a2333714aac616ed99c30350b30a4e7af7d3 SHA-256: 78a7fc1731bcdca13162c767dd974e97aa10db5aa7d5f64d0cc53ea179917838

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded scripts and is flagged for exploitability, specifically triggering PDF_EVAL and PDF_XFA_SCRIPT heuristics. ClamAV detection identifies it as Pdf.Exploit.Dropped-81, indicating it's a known exploit dropper. The embedded scripts likely facilitate the download and execution of a second-stage payload, though the exact script content is obfuscated.

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 7

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 0xD7	67 bytes
`embedded_file_obj0009.bin` `10524c8841105d398f3e8e8c790bc322eaa76a0f71d67929337ac5d9e1752e52`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	815 bytes
`embedded_file_obj0010.bin` `0704e53451984cad637df829d928999f75cd61fcfe2c8b263f5b24d436f15c4b`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4DC	101 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `e05c5e0a4a7d01be16f62d44f51223a52fb50d82e6f080d81bf5a6ac91ce61e5`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x58C	72331 bytes
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x12062	389 bytes
`embedded_file_obj0014.bin` `9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x12234	65 bytes
`embedded_file_obj0015.bin` `51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x122BF	147 bytes

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