PDF malware analysis — malicious · de7e6f012428e54e

MALICIOUS

PDF

9.5 KB

MD5: e00de9dcd4eee8d56fbad3fd83fe53e4 SHA-1: f0049926591670c0bb99ff533d630632a4dfdd91 SHA-256: de7e6f012428e54e2252a3033171f68634e04292d3fe522336b599f9d7709aa7

186 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, triggered by the CVE-2007-5659 vulnerability using the `collab.collectEmailInfo` function and `syncAnnotScan` primitive. The analysis recovered multiple deobfuscated JavaScript files, indicating a complex stager designed to download and execute further payloads. The presence of these JavaScript components and the specific exploit techniques strongly suggest malicious intent.

Heuristics 7

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)
ClamAV: Pdf.Exploit.Agent-13959 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13959
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `11b03694c4e705ab29873cc5e2c55342ee498b376ac2dc5f05ce17018ef44c38`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	264 bytes
`annotation_subject_callee_hex_stage_000.js` `6b238e3a14049246126d9426ce946a8a83362040fde91e20207818ad6e26af00`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14A	5136 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `86a4471097cb61abfd1c80f4010e220fb2b2f3f8838dd34fcfd28d842e6023cf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2CC	12125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `b4f53c70f9900ca48aebadeaf8b8acbd7faa187c909d2d0a1b07e483681b4b4d`	deobfuscated-js	PDF JavaScript deobfuscation pass	69580 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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