PDF malware analysis — malicious · 43f3754f7503b9c3

MALICIOUS

PDF

14.5 KB Created: 2010-08-29 16:19:36 Authoring application: CetyriTus CafUjustulce

MD5: 1bb327531fd7fcf35c78c2b943ca8b3e SHA-1: 5c64e757c74021845a32453c0da032731f00b1b5 SHA-256: 43f3754f7503b9c3fdc718f613f4976ff44fa7ea597e18003631ee3361b539ab

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded executable scripts and was flagged by multiple heuristics, including critical ClamAV detection for 'Pdf.Exploit.Dropped-81'. The ML classifier also strongly indicated maliciousness. The presence of XFA forms with risky scripts suggests an exploit is being leveraged to deliver a payload. No document body text was available for analysis, but the embedded script payload and exploit detection point towards a dropper functionality.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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
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/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x19E	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x24D	228 bytes
`embedded_file_obj0010.bin` `8286d10d0d266ff68df1c008ec2139b33d0984e95fe1416418774bac32bfa2fc`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x340	1760 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x6EE	199 bytes
`embedded_file_obj0012.bin` `70c5f1f31d4e16ac1bef89b47979c96cf36e2df06e5447de8f8a7b3329e1764f`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x7E0	29115 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x352E	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x35D5	56 bytes

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