PDF malware analysis — malicious · 7d7aec82fa3e8544

MALICIOUS

PDF

24.8 KB Created: 2010-09-10 02:11:18 Authoring application: Scribus 1.3.3.14 (via Scribus PDF Library 1.3.3.14)

MD5: 9cb14a8ed94aaf1028534675674cdd83 SHA-1: 764c12d58f930521a8ec1e4c6faedfa61dea2dda SHA-256: 7d7aec82fa3e85443754f204a38dda2bd09c926b8e6a0cbf76128f96f8dce6f4

82 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF file flagged as malicious by an ML classifier. It contains embedded JavaScript and an embedded file, indicating a likely attempt to deliver a secondary payload. The presence of PDF_JAVASCRIPT and PDF_EMBEDDED heuristics further supports this. The ML classifier's high confidence score (0.999972) reinforces the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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_obj0021.bin` `0309db5850dea096d566c8ed55dab6d656854b8b97c501a4ba94a0df94dbb272`	pdf-embedded-file	PDF EmbeddedFile object 21 at offset 0x5873	13430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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