PDF malware analysis — malicious · a0cffd0b2c0cdcc2

MALICIOUS

PDF

51.5 KB

MD5: 3e7d3dbd3a0d15855151da31d57963cf SHA-1: 5fa8614e7baad00f99ea326985d3fbcd3b9c63ce SHA-256: a0cffd0b2c0cdcc207c37ce2aec8c7b09025bef9e941cadef016e921712d42f8

128 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains an embedded JavaScript stream that is flagged as malicious. The ML classifier also strongly indicates maliciousness. The document is an image-only lure, typical of phishing, and contains an external URI pointing to a suspicious domain. The embedded script likely downloads and executes a second-stage payload from the identified URL.

Machine Learning

Nyx PDF Classifier malicious score 0.9884

Heuristics 6

Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
Suspicious extracted artifact medium 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.
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. (matched inside decoded stream)
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. (matched inside decoded stream)
External URI info PDF_URI

PDF contains an external URL action

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_002_off0000c81d.js` `9a264e1801ef2f92f4ffdef09903546960d606966bec97c0b8daa560736aee6b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC81D	2453 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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