PDF malware analysis — malicious · fc37d3594a626e8d

MALICIOUS

PDF

7.9 KB Created: 2008-08-19 12:14:36 Authoring application: avast5WF

MD5: 9f441105f810b0097050576264955983 SHA-1: ebcebf4d380ce5c0e2ac4b2d6f9d0c38b31bc0f7 SHA-256: fc37d3594a626e8db7ece657d0e6d9ef9666e1d8156d189c813a63c973d072ca

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.002 Phishing: Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF was flagged by a machine learning classifier with high confidence as malicious. Heuristics indicate the presence of embedded content and a script payload within a PDF stream. The embedded file 'embedded_file_obj0012.bin' is a strong indicator of a dropped or executed payload. No document body text was available for analysis, but the embedded script payload suggests an attempt to execute malicious code.

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` `1dae913830dcec5df259a9c56d09c2495f19606a6e1c59a0449d7c19e4d95a0c`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x3BE	1753 bytes
`embedded_file_obj0011.bin` `c97e0522381d6196cc0695f35f4d065f15c9c86a9601a7f776c6afd3f4c6b460`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x71D	199 bytes
`embedded_file_obj0012.bin` `9675414d3c21d6a7272ac911424a80e33785a07d14e1d5f4c8a97302567bb490`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x810	122766 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 0x1AFE	77 bytes
`embedded_file_obj0014.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x1BA6	56 bytes

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