PDF / .TMP malware analysis — malicious · 972d2640e211ddac

MALICIOUS

PDF / .TMP

1.95 MB Created: 2010-08-19 12:06:48 Authoring application: gelsLeg legByrl

MD5: 9d24b2a4a3e6935a87f4928b2f9c9565 SHA-1: efddb13853f4fae940e44d5ff237ea52eaf1a56f SHA-256: 972d2640e211ddac98d36349c4f72a490d54039a44611e0fd2ab3ed2220e2c7e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious PDF T1566.001 Phishing: Spearphishing Attachment

The PDF sample contains critical XFA heap spray exploit code and embedded script payloads. The presence of XFA forms and embedded files strongly suggests an attempt to exploit vulnerabilities within the PDF reader to execute malicious code. The embedded file 'embedded_file_obj0010.bin' is likely the second-stage payload. The exploit targets common PDF vulnerabilities, leading to arbitrary code execution.

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.
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 JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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 0xE9D	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xF4E	228 bytes
`embedded_file_obj0010.bin` `29693b4c3f93425aaefb394e329e6cc3c82a546edd89606cb007b4941e31c2d2`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x1041	25687 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 0x3ED7	199 bytes
`embedded_file_obj0012.bin` `ec12d2406a4fce14067d4a8ea61206698b5491a524a7dcf5f9909037f172ba4f`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x3FC9	131 bytes
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x4088	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x412F	56 bytes

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