PDF malware analysis — malicious · d1af1fe3831f6918

MALICIOUS

PDF

11.0 KB Authoring application: .a

MD5: 700dbbeadaf5375622479b6b37a5f6fc SHA-1: 32c27e0c5927baa287c601d740e8be5a832abfa7 SHA-256: d1af1fe3831f6918576acb0362385a53de40e6e41fd554185bc441ab2b21712a

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, identified as javascript_obj0018_000.js, is heavily obfuscated, as suggested by the PDF_UNESCAPE and PDF_FROMCHARCODE firings. The presence of obfuscated JavaScript within a PDF is a strong indicator of malicious intent, likely to download and execute a second-stage payload or perform other harmful actions. The extracted document body text is largely unreadable and appears corrupted, providing no additional context.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0018_000.js` `4fa8612b63eeee9ed292b15fad954b68e0e683df4033d55abe2077d6f38de349`	pdf-javascript-stream	PDF /JS object 18 at offset 0x4BA	163997 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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