PDF malware analysis — malicious · 8f70050c62aab9e5

MALICIOUS

PDF

27.1 KB Created: 2011-05-26 16:35:37 +03:00 Authoring application: bing.wiki.usfca.edu (via mPDF 5.0)

MD5: 5fa5a3d8784dcab6ef8b210c8157cbb1 SHA-1: 86a41e7223a2d393b538993aeffc7ad0d179c41c SHA-256: 8f70050c62aab9e5939fcaba8e936eb9ccaf781a5833a08f59c68a3a2cbb8d1a

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream was obfuscated using unescape() calls, as flagged by the PDF_UNESCAPE heuristic. The extracted artifact 'javascript_obj0022_000.js' also shows signs of obfuscation. This script is likely designed to download and execute a second-stage payload from a remote source, a common technique for malware delivery. The exact payload or download URL could not be determined due to the obfuscation.

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0022_000.js` `10e15f9e8e631690248396d575e9652903435250e89141f7cc58e4b3e9b10d1b`	pdf-javascript-stream	PDF /JS object 22 at offset 0x658F	136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).
`stream_003_off0000101a.bin` `ded1520fd68b91798ef4502ba393be29e6762be445da6319489229b957e57958`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x101A	17756 bytes
`font_01_sfnt_off00003e2c.bin` `a8ed3909966b10c026f46212f55dce68c94667ce1ac039797d3ebfa1d644dacf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x3E2C	17892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.