PDF malware analysis — malicious · e88abbdeadacef3a

MALICIOUS

PDF

44.8 KB

MD5: d4cae0def782c455dab33849efa8e1ce SHA-1: 52d4215acb29e1bdabc91cf2d727001cda0fa67a SHA-256: e88abbdeadacef3a8815cc054c110ade2ea3f01272814f43d0e2f9bcb5b3f6be

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and U3D content, triggering heuristics related to JavaScript execution and a known Adobe Reader 3D parsing vulnerability (CVE-family). The presence of multiple JavaScript files, including a large 'deobfuscated.js', suggests a complex execution chain. The unescape() function and syncAnnotScan primitive further indicate obfuscation and exploitation techniques. The primary attack vector appears to be leveraging these embedded scripts to achieve a malicious outcome, likely downloading and executing a secondary payload.

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 0x44D1	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` `43673cefce995fadab8d976fd739c4369204acc6c1ad00584ac72b4073071dba`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BA7	12424 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` `3859bf6886c764694b974c03b8dd61c4cec364b6fa8b4820b671552ef584d83d`	deobfuscated-js	PDF JavaScript deobfuscation pass	314472 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_off0000470f.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x470F	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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