PDF malware analysis — malicious · a5322ab4a70f98ec

MALICIOUS

PDF

12.5 KB

MD5: ab9da8d4130d46e35b1c8fb04d7d75fa SHA-1: 7a8817503776adbc43d4b973caf7a64f25009ebe SHA-256: a5322ab4a70f98ecde628c329bbbd91edeb9db96d2568ee83c87162de91b034b

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified as a critical vulnerability (CVE-2007-5659) related to the Collab.collectEmailInfo function. The analysis indicates that this JavaScript is likely used to download and execute a second-stage payload. The presence of deobfuscated JavaScript files further supports this finding.

Heuristics 4

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)
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `bc1943717071ef9dbfbfe0aec52672999d2f1aa061a381d3e16c51376e56f863`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12374 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `fee36ff204942487422eca8be56204d7901fe4f9e14ea009f7a4e1ad8ee11513`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5039 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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