PDF / .COM malware analysis — malicious · 8bb16b903a574dc2

MALICIOUS

PDF / .COM

45.8 KB

MD5: 887016797091fafffb0af2d1b8b8ad53 SHA-1: e2c199356b83a41e4380153be8faa45b0c0c105a SHA-256: 8bb16b903a574dc28cb342b50ba22009e1fa940ff8b80e65ef6bdc071479ec9d

106 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains embedded JavaScript and U3D content, indicating an attempt to exploit vulnerabilities. Specifically, the 'PDF_U3D_CVE_RELATED' heuristic suggests exploitation of Adobe Reader's 3D parsing. The presence of multiple JavaScript streams, including a large deobfuscated one, points to the execution of malicious scripts. These scripts likely download and execute further payloads, although the exact mechanism is obscured.

Heuristics 6

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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj0009_000.js` `dfb6a2d04b5effac3284ad7789dfd719b0cc57775cca077cf7b18ec7ba88dcd4`	pdf-javascript-stream	PDF /JS object 9 at offset 0x48AC	487 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `0a99618ee5ccb39b1a89fb0f393632c14783c50cc766253201381525495249c6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1D4F	13043 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` `e7021e1a92c5d472504b6789d959a3ed47ddbfe50f4e3fb51b2e00d4fdfa33f0`	deobfuscated-js	PDF JavaScript deobfuscation pass	319068 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004aea.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4AEA	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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