PDF malware analysis — malicious · de98e682013b5a96

MALICIOUS

PDF

12.0 KB

MD5: 204b7a51bb46a8929fb1f8d30150238e SHA-1: 80027f6647418eee41f2300fdc9f94288d2f276e SHA-256: de98e682013b5a966daa2a70aeb137ab2e3743e4df713adaf3bd7e4e206b8616

120 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, identified as a stager for CVE-2007-5659. This JavaScript is obfuscated and decodes further malicious code. The primary attack vector appears to be exploiting a vulnerability within the PDF reader to achieve arbitrary code execution. The specific payload and its ultimate goal are not fully discernible from the provided evidence, but the mechanism involves JavaScript execution and a known exploit.

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.
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 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
`annotation_subject_callee_hex_stage_000.js` `af1fa78715e9290983290b8136228cfcdb99640a54a0cc23836750532dfc37cc`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	4940 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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