PDF malware analysis — malicious · 8e41361f8143c36b

MALICIOUS

PDF

12.6 KB

MD5: 6853422d0cb9a5915a21cbf494b5ed83 SHA-1: 83adf3ba02514621870ef8d2e3e68d53abc73ee9 SHA-256: 8e41361f8143c36b659180c7ec9ee0d19d61daf178762ce611b0a992a0312f80

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically identified as a hex-stager exploiting CVE-2007-5659 via the Collab.collectEmailInfo function. This stager is designed to decode and execute further JavaScript, indicating a multi-stage attack. The primary function of the embedded script appears to be downloading and executing a second-stage payload. The presence of obfuscated JavaScript and the specific exploit technique point towards a malicious PDF designed for initial compromise.

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)
Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER

PDF JavaScript uses syncAnnotScan()/getAnnots() to read an indirect annotation /Subject stream, percent-decodes it through marker replacement, then uses a callee.toString()-derived key to decode and eval the final exploit stage.
Suspicious extracted artifact high 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `0df291d69669aabea8d48539ff6e3447b14e49a861871000e6476334f075bd19`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	1011 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`annotation_subject_callee_hex_stage_000.js` `2ad3e7202a7a9ad188fa0af16df0968075e18c13653173b3333cdd168b998e7a`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5367 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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