PDF malware analysis — malicious · abe15b9e62d40f6f

MALICIOUS

PDF

44.5 KB

MD5: 286f8c5c2e656c74773b1231515e0d40 SHA-1: 99607a025ac30224f4bff768af011a5cd3ab6112 SHA-256: abe15b9e62d40f6f2f347fb725a78cf1ef9810ff2a4a061f35d3f5a6c2843d93

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo) to execute a hex-decoded JavaScript stager. This stager is designed to download and execute a second-stage payload, indicating a typical exploit delivery mechanism. The presence of U3D content also suggests an attempt to exploit related vulnerabilities.

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `fc5b426b863fda3995fccd3f522ce82f4a2e780f06c61c18c1f9c560eb55c984`	pdf-javascript-stream	PDF /JS object 9 at offset 0x437F	493 bytes
`annotation_subject_callee_hex_stage_000.js` `9ec03b55028bd49b08ac270c2bda252dc6a0f6df46e761630ea5f5bbf6c66180`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1AE2	5414 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `4c72940f71553cb94572497ab485df82c88e7d6ac6787ac2711d49c07c502c05`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B36	12167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `98c98ff5bf887a61599e922ff7f1924eb76f8ce2944488a7a68242f31f2479e3`	deobfuscated-js	PDF JavaScript deobfuscation pass	316134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off000045c8.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x45C8	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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