PDF malware analysis — malicious · 4975780120846568

MALICIOUS

PDF

20.5 KB

MD5: 843ccda020f62cfbff131e968eaed3e5 SHA-1: 8b7b6d255bd49a5cdc0902cd23ad77d642cb81c8 SHA-256: 49757801208465684de1cadbcd9559f7e7209a899b41e80c735ad655836b52b5

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, a common technique for executing obfuscated code. The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in Adobe Reader via the Collab.collectEmailInfo function. The embedded JavaScript is heavily obfuscated, but the presence of eval() and the specific CVE exploit suggest the script's purpose is to download and execute a secondary payload. No specific family could be identified due to the generic nature of the exploit and obfuscation.

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` `bb1e5a34e15ed0aad731e776cfd9c815e95dc73d939a4b843e45e964bbcc314e`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3736 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111712_001.js` `cbcbc0e6be4ec5427ed9a9b59451aab9a5dae6c696c2b36dbe305b789259710f`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x105C	14930 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `ad87dea765d3d9738f4ae55e74c607096b43d52991c6de9af8399a758a1cbeda`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4AE4	1726 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` `5b834cb777e4b751deef8a00c9ea05090b3429d2751ac04cee72959262540f14`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x105C	1475 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` `519e7432998e8f7c2a68f67400b421aaa8833f4f744ab85b341357a1bdf4317a`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4AE4	88 bytes
`legacy_pdfkit_stage_002.js` `ad1203af5a0457983b904a618ea864326521ef1d5a82f0410d250839f71a4566`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x105C	1564 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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