PDF malware analysis — malicious · a1fc0d594d4d61b3

MALICIOUS

PDF

9.7 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: 8fb7d7d7276f64cfbcaebbcfac184b06 SHA-1: 65bdf5da38ab973c07f656871b9731a2fc7cc1ec SHA-256: a1fc0d594d4d61b396262f231dc4c2fa0875bce865afdffef3186e6df7993dce

98 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_LAUNCH heuristic suggests an action is triggered upon opening, and the PDF_EVAL heuristic points to the use of eval(), a common technique for obfuscating malicious JavaScript. The extracted JavaScript file, 'javascript_obj0027_000.js', likely contains code to download and execute a secondary payload, which is a common attack pattern for malicious PDFs. The confidence is slightly reduced due to the lack of specific IOCs like URLs or hashes within the provided evidence.

Heuristics 5

Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
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
`javascript_obj0027_000.js` `631f4850ddaf2e888cc5e877d18945ff1431495b773ef6e5f4a17e7a7baf9fe8`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1C1B	3372 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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