PDF malware analysis — malicious · 45374455f10aae47

MALICIOUS

PDF

11.8 KB Created: 2011-06-01 16:14:03 Authoring application: amu rug

MD5: f986630baf582799b045b82aa0b789ad SHA-1: 5b5e6fe887679ac29814a046425d98fb908a56f5 SHA-256: 45374455f10aae47e239ae17724761bdd1a0bc1ade525e333b666d37754a9dda

208 Risk Score

Malware Insights

The PDF sample contains XFA form elements with JavaScript that triggers a heap spray exploit. This exploit is designed to download and execute a second-stage payload, indicated by the embedded file artifact. The ML classifier strongly suggests malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

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.
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_obj0014.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xA02	84 bytes
`embedded_file_obj0005.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xAB3	228 bytes
`embedded_file_obj0009.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xBA3	199 bytes
`embedded_file_obj0012.bin` `08f75333118cf29ac9a149c237d330671075e8e9d7f2e2c77cf3798e61eda2ad`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xC94	119 bytes
`embedded_file_obj0015.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xD4B	77 bytes
`embedded_file_obj0011.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xDF2	56 bytes
`embedded_file_obj0013.bin` `fa9bb67c4c9b9e868c769d9c7fd87b64adae41d9a377075c73082e175817b4c1`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x112D	11307 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).

Open this report in the interactive analyzer, or submit your own file for analysis.