PDF malware analysis — malicious · e8cc231063851278

MALICIOUS

PDF

12.4 KB Created: 2010-11-18 04:24:39 Authoring application: hem gor

MD5: a98c7df0cdda7cd25bbc2efd7c6965c7 SHA-1: f1af31be373d15129a0ada118094ad88a0ec8378 SHA-256: e8cc2310638512782a3ac57ba7bf2dfaf26315417244c897d4d44b805f2f47c3

208 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell T1566.001 Spearphishing Attachment

The PDF contains embedded files and risky executable scripts, as indicated by multiple PDF-specific heuristic firings including 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'PDF_XFA_SCRIPT'. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of an embedded file object (embedded_file_obj0006.bin) and the ClamAV signature 'Pdf.Dropper.Agent-9448968-0' point towards this file acting as a dropper for further malicious content.

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.
ClamAV: Pdf.Dropper.Agent-9448968-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-9448968-0
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_obj0002.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x936	84 bytes
`embedded_file_obj0004.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x9E7	228 bytes
`embedded_file_obj0005.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0xAD7	199 bytes
`embedded_file_obj0013.bin` `134df4532a252aaca39c37c7bbdff176cdce2f5f9679599d80bbcf2889e80255`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0xBC8	119 bytes
`embedded_file_obj0011.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xC80	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xD27	56 bytes
`embedded_file_obj0006.bin` `27abd6724fe70a5d1a96d55db8a7b9cc132fccb3773329b4ef3fcf8be630fcb0`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x105E	12557 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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