PDF malware analysis — malicious · 8d196b2c903b572e

MALICIOUS

PDF

16.7 KB Created: 2010-03-13 16:18:44 Authoring application: UoPvlHM73T (via tGceYhO7K)

MD5: 5cb39da806e8b91aeebc50a8da3d9b82 SHA-1: 419a578ca0a45e36510ac21a7cee11c014ac9a9b SHA-256: 8d196b2c903b572e356c3c012b4665cc0e6be1b54b6ce150a655f34f41fd964f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and a high-confidence PDF_EVAL call. The JavaScript stream, named 'javascript_obj0007_000.js', is likely responsible for executing malicious actions. The presence of `String.fromCharCode` and `eval()` suggests obfuscation, common in malware delivery. The exact payload or intent of the script cannot be fully determined due to obfuscation, but it is designed to execute arbitrary code.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `06550e45c5b49968e5193f313d46add8d9d49198fe81d523d91e93ef03d5e649`	pdf-javascript-stream	PDF /JS object 7 at offset 0x243	15848 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_000_off0000008a.bin` `335770428873a23695b840c5bdc33b63e350d49e853fb11885f4ce305c3ed435`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8A	79 bytes

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