PDF malware analysis — malicious · 38359d7fd036aaeb

MALICIOUS

PDF

105.7 KB

MD5: 410ee457aa4a4926e8c89357ccc1dd59 SHA-1: a342bfc64c8946d9a78ad6d11b2395b0808b9335 SHA-256: 38359d7fd036aaebd098faaab22fe6e902de36a66723a47481c195920763ea44

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF contains multiple indicators of malicious activity, including embedded files and scripts, XFA forms with executable scripts, and the use of unescape functions. The presence of an embedded file named 'embedded_file_obj0008.bin' suggests it's a dropper for a secondary payload. The heuristics indicate potential exploitation and script obfuscation, making it difficult to determine the exact payload or family without further dynamic analysis.

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.
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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `2f876cac22d690a860292ffc653f188ce59e72d5f100040d3c65e6ca48a09b4b`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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