PDF malware analysis — malicious · a152a9936f0ffcad

MALICIOUS

PDF

4.0 KB

MD5: 598977b1224bd1f800f805767f8a3380 SHA-1: d0e6f85e5511a150054eb1ad17fba4d05815f6ee SHA-256: a152a9936f0ffcada279842b0c82fb356d0b1b6041ee8824b9861c6a7d6831d8

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical PDF_EVAL and PDF_FROMCHARCODE firings suggest the JavaScript is obfuscated and likely executes arbitrary code. The ClamAV detection of 'Pdf.Dropper.Agent-7288455-0' further confirms its malicious nature. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common dropper technique.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7288455-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7288455-0
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. (matched inside decoded stream)
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_obj0013_001.js` `2383d1830caba593b9e64752c5cba4d5e981b404724dc3c81ddaf0cc6e536936`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6229 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `2aac2d7eb254ef0479b8fe73fdd15dde89ce05dd4cbe6477c40854cec234157a`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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