PDF malware analysis — malicious · 9f32aae73e4a7015

MALICIOUS

PDF

20.4 KB

MD5: 7b2b655e4e31a5758348498976a175ea SHA-1: 10de8ad4bd0915f1ba1940f015dcf4ac07e9af47 SHA-256: 9f32aae73e4a7015b629957052fdd94149f5c606a0322cc6a72088bcf060f6b1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes the eval() function and the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated, but the presence of eval() and the specific CVE exploit indicate an attempt to execute arbitrary code. This is likely intended to download and execute a second-stage payload from a remote source, a common technique for initial access.

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)
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.
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `8c054f449eb1bced730b81f1b5590ec274caef2463c9dd77ce6add92b8937eed`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `e29a241163c5d6e048482b4dab55885cb4cd8f01d3728193e8586df296595a41`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEE2	15296 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `036229b558d631f2e6b741a47417331303393990959fc1c0fc18bfa04d47a748`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4AD8	1664 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `ec56b382ff6c96d3ba9637e1f919996bb21c574a0be796ecf913e3ef592c4072`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEE2	1472 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `66201566cb7b94b96d78c07e61c80e11578b5125ea85cc864e3cc788698af3dd`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4AD8	79 bytes
`legacy_pdfkit_stage_002.js` `17d523c7015a1b1736315cf7081df298ee1fdf34d1627e7ee8399ecc9ed4f040`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEE2	1552 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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