PDF malware analysis — malicious · a2e42ad2d8f7bd76

MALICIOUS

PDF

6.3 KB

MD5: fcf3ded73e88f11d0a180f5e4960f4e3 SHA-1: 2a6c91da7dfb04013adc7836aa1c0895cfefba4d SHA-256: a2e42ad2d8f7bd7620ad00f14c9293e344db840bd29122a6faac10be51e73600

66 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, flagged by multiple heuristics as malicious. The ML classifier strongly indicates maliciousness. The JavaScript is obfuscated and appears to be designed to download and execute a second-stage payload from the URL http://www2.powerfcholder.arm.ee/. This is a common technique for delivering further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://www2.powerfcholder.arm.ee/?92snz08=XZXg0reVsNWV7M7Wo5uYpaGK2ealb6ef4GVspKapy6WcidziqZWYpWtopaWtZmiW2%2Bqio5aTn5XNxsfkdnTJvqCgodSsqovlig%3D%3D

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `fbc6fbb8af94550b90c419ab31711f5766b955ba19907054c99b8f549419e9b5`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1CF	5627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).
`javascript_obj0005_001.js` `f475f6b455ccffb7d52ef3248658ec83857266895043218ee21527bc6663c4b7`	pdf-javascript-stream	PDF /JS object 5 at offset 0x1F2	5910 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s). Carved artifact contains 1 long hex-escaped blob(s).

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