PDF malware analysis — malicious · 5912ee743d55ce7f

MALICIOUS

PDF

12.3 KB

MD5: 7f7b30aa69f0b2cc13c1bda813453c9c SHA-1: 3d686255dcc8c9ae8a1b3bb3a7ceec7693b1ca55 SHA-256: 5912ee743d55ce7fac6c11e4ac284f3910e1f486ef2e3c2941f00967fbd086c2

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability related to 'Collab.collectEmailInfo'. The heuristic 'PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER' indicates that the annotation subject contains a hex-encoded JavaScript stager. This stager is likely responsible for downloading and executing a second-stage payload, as suggested by the recovered JavaScript artifact. The obfuscated nature of the script and the exploit used point towards a malicious intent, though a specific family cannot be confidently identified.

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` `9cdbf975bb268164810d7fb77b55a281b7c15d032bb469bfd3621c0cf68414fc`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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