PDF malware analysis — malicious · 81bc5e4fa65c5b03

MALICIOUS

PDF

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

MD5: 69a60044efa3455d822f372d459312bc SHA-1: fa397943b646f021fd197067e15125192dc5e653 SHA-256: 81bc5e4fa65c5b034bb3f0f1d87923e0d21a967bf055a90bb5a78ab522bec6bb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1027 Obfuscated Files or Information

The critical ClamAV detection 'Pdf.Exploit.Dropped-81' strongly indicates this PDF is a known exploit or dropper. The presence of embedded files and scripts, along with the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic, suggests the file's primary purpose is to execute malicious code or download further stages. The lack of readable document body text means the specific lure cannot be determined, but the technical indicators point to a malicious exploit delivery.

Heuristics 4

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

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0006.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x234	84 bytes
`embedded_file_obj0007.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x2E9	228 bytes
`embedded_file_obj0008.bin` `5c02879832e64eba235180d9638bbeb688fb56772a023b96f9f67d87d1a1822a`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x3DD	1271 bytes
`embedded_file_obj0009.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x71C	199 bytes
`embedded_file_obj0010.bin` `7028ca0587b18d161642a5368bb9e7601e711c2b6ad2c15b9e89f47a9504e844`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x813	10463 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x1160	77 bytes
`embedded_file_obj0012.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x120B	56 bytes

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