PDF malware analysis — malicious · 2a7a6cd892c27639

MALICIOUS

PDF

7.6 KB

MD5: 2261a865201e69c943b47c084e6375cb SHA-1: af30c5272906dff044a4abc832d2047a8cfec2b1 SHA-256: 2a7a6cd892c2763958fcefa2d1944f6436c36c6a742ee2201a87523069c950c9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains multiple embedded JavaScript streams and triggers actions via AcroForm buttons, indicative of malicious intent. Specifically, the 'CVE_2014_0496' heuristic firing points to the exploitation of a known vulnerability (app.addToolButton/removeToolButton) to execute arbitrary code. The embedded JavaScript, particularly the decoded stream using unescape(), is likely responsible for downloading and executing a secondary payload, although the exact nature of the payload is not discernible from the static analysis alone.

Heuristics 8

app.addToolButton/removeToolButton — CVE-2014-0496 critical CVE exact CVE_2014_0496

PDF JavaScript combines app.addToolButton() and app.removeToolButton() with heap-spray shellcode markers — the public Adobe Reader/Acrobat ToolButton use-after-free exploit shape for CVE-2014-0496. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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_obj0001_000.js` `df7a75f08cf4a10530cba8c89a9d58b484202cc65e0390ddc7278cfdc402e2f1`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	4583 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 13 eval/decoder/string-building token(s).
`stream_000_off0000153c.js` `d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x153C	1042 bytes
`font_00_type1_off000019d8.bin` `c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b`	pdf-font-stream	PDF embedded font (type1) at offset 0x19D8	97 bytes
`font_01_type1_off00001c5f.bin` `b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d`	pdf-font-stream	PDF embedded font (type1) at offset 0x1C5F	144 bytes

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