PDF malware analysis — malicious · b488197b44232a88

MALICIOUS

PDF

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

MD5: 545a16d6542a2587c97b7e3831a382e3 SHA-1: c121a87d701399b23dcf78c48b6775dd47fef2bf SHA-256: b488197b44232a88d36ddb9a568037ab9fab7943316d52d9f81f010213a8986d

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection of 'Pdf.Exploit.Dropped-81' strongly indicates a malicious PDF exploit. The presence of embedded script payloads and multiple embedded files further supports this, suggesting the PDF is designed to drop and execute a secondary payload. The document body content is not human-readable and appears to be obfuscated or malformed.

Heuristics 6

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` `a4e7fc0559523fc43634e7ac4a621c8e46b4fff733241c41499405f234c91c08`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x2D8	483 bytes
`embedded_file_obj0011.bin` `ca0667fa5a94a536bb4ce9f00a9dc40182d755db85ac3544421deb4b2d2946c4`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x506	29389 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 0x781E	323 bytes
`embedded_file_obj0014.bin` `6a34b324794c506fbd6dbfa05a2e584bfc5348352bd53c09255137659edd58cc`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x79AB	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 0x7A96	77 bytes
`embedded_file_obj0016.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x7B2A	56 bytes

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