PDF malware analysis — malicious · f35bf093d4cd1771

MALICIOUS

PDF

20.6 KB Created: 2010-08-19 07:25:30 Authoring application: almaLet yumAlma

MD5: 5363eef5c0baed5a2f132ad66ceec0a8 SHA-1: 745247833ae70c880ced140b4dbdbddbf57cb73c SHA-256: f35bf093d4cd1771356091023687b580dbc687e41f315ce3e3097126e43f50e1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

The PDF sample contains critical heuristic firings indicating XFA JavaScript heap-spray exploit code and risky executable script content. An embedded file, 'embedded_file_obj0010.bin', was also identified as a suspicious artifact. The script's purpose is to download and execute a second-stage payload, leveraging the heap spray to bypass defenses.

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.
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.
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_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x1579	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162A	228 bytes
`embedded_file_obj0010.bin` `7310625f3dcde4f937d90de2ba314b1404f2e64433f10749d9a395a4cbf4fea3`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x171D	28479 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4A28	199 bytes
`embedded_file_obj0012.bin` `51370ec52f8707fbf4622eeeeece82d9f20990f89495c9e00d9149c338cbdcda`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x4B19	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4BD6	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4C7D	56 bytes

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