PDF malware analysis — malicious · 28b4f7501dfcaff7

MALICIOUS

PDF

12.8 KB Created: 2010-12-03 18:53:23 Authoring application: sac rig

MD5: 4c1c7867d3e23c19c6d78a4215047d61 SHA-1: cb9e75b8b2c21255383fa07e02d30907d7ae07bb SHA-256: 28b4f7501dfcaff71718d1880b60b8222244ebe3e231662f74e75d68493ac88b

238 Risk Score

Malware Insights

The PDF sample contains critical XFA JavaScript heap-spray exploit code, indicating it's designed to execute arbitrary code. The ClamAV detection of 'Pdf.Dropper.Agent-7242119-0' further confirms its malicious nature. The embedded file 'embedded_file_obj0007.bin' is likely the second-stage payload.

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.
XFA JavaScript heap-spray exploit code critical PDF_XFA_HEAP_SPRAY

PDF contains XFA script content with heap-spray or shellcode-like JavaScript markers such as large encoded word sequences, util.pack, large arrays, or spray variable names. This is a weaponised Adobe Reader exploit pattern, not a normal interactive form.
ClamAV: Pdf.Dropper.Agent-7242119-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7242119-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0005.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xD55	84 bytes
`embedded_file_obj0012.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xE07	228 bytes
`embedded_file_obj0001.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xEF7	199 bytes
`embedded_file_obj0003.bin` `58390446f3a9816d9a942ddc6c7a2605766e385ca2254bd9a154d4a5db08e1cc`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xFE7	119 bytes
`embedded_file_obj0018.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x109F	77 bytes
`embedded_file_obj0002.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x1145	56 bytes
`embedded_file_obj0007.bin` `3a25664af6ef3d1039018f181bccaf15a07f43b9c1150413afc4924d4c07bb25`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x147F	11466 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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