PDF malware analysis — malicious · a5d4cd7289048a63

MALICIOUS

PDF

31.2 KB

MD5: 7c61e20d03f5c55257cc5d9f6d4b1878 SHA-1: 64932cc6a1c0ef046f5965dd1d84d248ba735fe0 SHA-256: a5d4cd7289048a63b5efcdc0475dc7e65ee93b0b135fcc5722b31ab047351917

106 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and a Flash object. The presence of `eval()` calls within the JavaScript suggests code execution, likely to download and execute a second-stage payload. The extracted artifacts, including a SWF file and JavaScript files, further support this assessment.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ZdhyXAVZwLWfPiH.swf` `767382813fc770c9716554c3266b22eee1636037ca964af05acf6ff66db4a27d`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x11CD	26993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.98, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `d8d1bf1250e62c22dad7bd607b36f3347bed6032ce282e2ba6687b60e30ccf17`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF9	3445 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `1a94b142e4681abff1a478c93a4acd5147bd4de7cc12591a55e8f4f79e0153a7`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xDB1	2109 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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