PDF malware analysis — malicious · ccbd0bace9b22f37

MALICIOUS

PDF

5.5 KB

MD5: 76045a1b621513398408bd767ec29843 SHA-1: b9de95877d793962ed9f44ac0dbcef2e723d53b9 SHA-256: ccbd0bace9b22f37711f2d71dd5859da4522945b3699e26996a03141e4982d6e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file contains an XFA form with embedded JavaScript, indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The embedded JavaScript, found in stream_000_off0000069a.js, is likely responsible for downloading and executing a secondary payload. The presence of XFA forms and embedded scripts suggests an attempt to exploit PDF viewer vulnerabilities for initial execution.

Heuristics 5

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_000_off0000069a.js` `1d55452250faec57384f151af44940d966131722eb66744f9254347e7c115c68`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x69A	14728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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