PDF malware analysis — malicious · 2016dcc050cb43ad

MALICIOUS

PDF

12.2 KB

MD5: 117d1fd3bdf39603bd032feda75fc5ee SHA-1: e99cf89705c9e68b2397b52189c303ccc0825ddd SHA-256: 2016dcc050cb43ad8aebd5597777050e0e83e336a68163bf193866c13e99fe2a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known exploit targeting Adobe Reader, specifically related to the Collab.collectEmailInfo function. The presence of deobfuscated JavaScript files (legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js) suggests that the script is designed to download and execute a second-stage payload. The exact nature of the payload is not detailed in the provided evidence, but the exploit and script execution point to a malicious intent.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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.
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
`javascript_obj0007_000.js` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `f9dc560871f579fc318b6ea08c888af616b2ccb7c0fa92f43972f4b76c2d8dd4`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5204 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `eb95f8340fa2c26e00b3a4b8f7e2aeaf3902740d0e17097962274e97e5cd2210`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12447 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 base64-like blob(s).

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