PDF malware analysis — malicious · d71b63b10bda5a5b

MALICIOUS

PDF

43.1 KB

MD5: 9226ea5955d28db2b6249aef1333c105 SHA-1: ad39af597fb5360cd2be3d07baf9ff6918c64a3a SHA-256: d71b63b10bda5a5b7e548b8d62a6e88b313b2eeb746050b8dc40955dd49d8531

72 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and EXTRACTED_FILE_STATIC_TRIAGE. The extracted artifact 'javascript_obj0012_000.js' is suspicious due to obfuscation indicators. This suggests the document is likely a lure to execute malicious JavaScript, potentially leading to further exploitation or payload delivery. The presence of XFA forms and ASCIIHexDecode filters further supports a complex, potentially malicious, PDF structure.

Heuristics 7

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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
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)
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `1ce279030845fe7f14c01280c403e5892bbdd2db1cba679dcfc7e444e14e36b1`	pdf-javascript-stream	PDF /JS object 12 at offset 0xA0B2	3869 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s). Carved artifact contains 4 long hex-escaped blob(s).
`font_00_sfnt_off0000033c.bin` `26f3e7c91c76e658576c1bbb605ddb8e33e657870ea2f8ad3b8fe8f80b303358`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x33C	65932 bytes

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