PDF malware analysis — malicious · b62655a0e91bec81

MALICIOUS

PDF

44.0 KB

MD5: 00863c40dd2027bb010d455893f7e084 SHA-1: ccae534d30846923717a149ea425290207a21b92 SHA-256: b62655a0e91bec81a5dc98c81b9d1f59ab71ac3c74991cd8196836beb6b07910

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1190 Exploit Public-Facing Application

The PDF file contains embedded JavaScript and U3D content, triggering heuristics related to JavaScript actions, unescape calls, and potential CVE-related exploits in Adobe Reader's 3D parser. The presence of multiple JavaScript files, including a large deobfuscated one, suggests the execution of malicious code. The primary attack vector appears to be exploiting a vulnerability within the PDF viewer to run arbitrary code, likely leading to further stages of infection.

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` `3185725d1d6720a44a86ea6b71cc2cc403b0506593fae676bafde71d6ece01a0`	pdf-javascript-stream	PDF /JS object 9 at offset 0x418B	472 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` `f5464ebb0b62a57c9ffc8b24e671bc915dd3c3a1031ea2a06d75657d053f2fde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1A5B	11845 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` `d8dfe240670769671b4986eac7e27583082750f34ae2b16470d6389d0ce1e2f1`	deobfuscated-js	PDF JavaScript deobfuscation pass	227750 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_off000043c1.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x43C1	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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