PDF malware analysis — malicious · a1bb46227adfdb88

MALICIOUS

PDF

7.9 KB Created: 2008-08-19 12:14:36 Authoring application: avast5PP

MD5: a9422760a2068ba1448e4acb03dbe5bb SHA-1: 845299cabf525ead49acae5f1d32c770b9f754c8 SHA-256: a1bb46227adfdb88506c70cbe513a7dbd037045b75fb85e02528db18cdefceac

68 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF was flagged by a machine learning classifier with high confidence (0.999885) and exhibited multiple heuristic detections for embedded files and scripts. The presence of 'embedded_file_obj0012.bin' suggests it is a primary artifact for delivering a malicious payload. No document body text was available for analysis, but the embedded nature and script payload indicate a likely attack pattern involving the execution of secondary malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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_obj0008.bin` `d81baa73e490e4cb879e13927cacd1dd1be37524a37eac51603e15117c578777`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x21C	84 bytes
`embedded_file_obj0009.bin` `24c130f03a4cf51d470b536e94c1e58af67665739e200e0ce198ad41086243c0`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x2CD	228 bytes
`embedded_file_obj0010.bin` `682e548048e75bf2d055445c3aa121fc157c97b9d32b213f570e0eb606a994f9`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3BE	1759 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x723	199 bytes
`embedded_file_obj0012.bin` `4c1e3d7fbae8f4bb897c7adfe432bbd03ca777b1aca5b2612eec6f67779ebc80`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x816	123206 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0013.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x1B24	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1BCC	56 bytes

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