PDF malware analysis — malicious · afbdea7efcd792e0

MALICIOUS

PDF

11.6 KB

MD5: 2030c858073f49d3d110ed7670d27b1b SHA-1: 7f9e06707f8c4f5665061b2b77db564a14b7160b SHA-256: afbdea7efcd792e023b1158fe27bc73df4638c2dcaeb4c8dd1334f160626c9b2

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, specifically identified as a CVE-2007-5659 exploit targeting the Collab.collectEmailInfo function. This exploit is designed to decode and execute a hex-encoded JavaScript stager. The stager, recovered as annotation_subject_callee_hex_stage_000.js, is responsible for further obfuscation and execution of malicious code, likely leading to a second-stage payload download or execution. The confidence is high due to the direct identification of a known exploit.

Heuristics 6

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `c860bd3a1b8438b37e98a599719a1868ae540624631f091272ffef48912644f4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	579 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`annotation_subject_callee_hex_stage_000.js` `e29a27aa3c04c48ca83a6e950c92d7468a297f54bd755877610e496978102113`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5053 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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