PDF / .TXT malware analysis — malicious · 9d3330ab097878c1

MALICIOUS

PDF / .TXT

14.5 KB Created: 2010-09-15 17:00:43 Authoring application: row amu

MD5: 8b43aa2d2dd23781a13f33655aef441a SHA-1: 1f75af722172120eb705eff77a744e536368d937 SHA-256: 9d3330ab097878c1b76300a09b802b8dcf1925f2622c3367508e8ba1dedf2bd3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF sample contains critical XFA JavaScript heap spray exploit code, indicated by the PDF_XFA_HEAP_SPRAY heuristic. This exploit code is designed to execute arbitrary code, likely to download and run a second-stage payload. The presence of embedded files, particularly a large one named 'embedded_file_obj0009.bin', suggests it serves as the initial stage for delivering this payload.

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_obj0005.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xEA9	84 bytes
`embedded_file_obj0003.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0xF5A	228 bytes
`embedded_file_obj0002.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x104A	199 bytes
`embedded_file_obj0006.bin` `e5a1a6b57ad985d4f7d54e62393d83c2bade97ab96adc87e5e759c493fa56542`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x113A	119 bytes
`embedded_file_obj0008.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x11F0	77 bytes
`embedded_file_obj0017.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x1297	56 bytes
`embedded_file_obj0009.bin` `9fff930ea1bce69796e6a621c5c323a26e1a27ab56e6c04c6f432c785e7569da`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x15D1	14411 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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