PDF malware analysis — malicious · a19013dd1b196717

MALICIOUS

PDF

17.6 KB Created: 2009-03-15 08:05:10 Authoring application: OgWXq1 (via t33TwG8bi)

MD5: 0f14e12db1b092231112d5633c7df824 SHA-1: 039723d94309fe7b7ec0d2632b5ecae26a55f17b SHA-256: a19013dd1b1967179311e5ee08abe72fd2c8ec7f167d6c8d378f12c3db9b718c

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical ClamAV detection of 'Js.Trojan.Obfus-48' strongly suggests malicious JavaScript is present. The JavaScript is obfuscated, as noted by 'String.fromCharCode' and 'eval()' calls, and is likely designed to download and execute a second-stage payload. The authoring application 'OgWXq1' and the embedded artifact name 'javascript_obj0007_000.js' further support the presence of malicious script.

Heuristics 6

ClamAV: Js.Trojan.Obfus-48 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Trojan.Obfus-48
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `ec00ee1f0288901e157ef7e6e142cd7fa97ae269097a1ff0278c2ae2a90434b0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x239	16648 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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