PDF malware analysis — malicious · cc271fb69cc08c8a

MALICIOUS

PDF

78.3 KB Created: 2010-02-23 12:29:53 -08:00

MD5: f330f7bfe41fb6b4bd9969f3833f9f15 SHA-1: b7a1b22ba13453da9e600f6d982f9aa8ab8cc59e SHA-256: cc271fb69cc08c8a490df58e1ac70a1e72dd6d6ceee494d008d64c741805e823

104 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript and an embedded script payload, indicating an attempt to execute malicious code. The ML classifier strongly flagged this PDF as malicious. The presence of an image-only lure suggests a phishing attempt designed to trick the user into interacting with the document to trigger the payload. No specific family could be identified, but the techniques suggest a downloader or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9837

Heuristics 8

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.
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 2 image(s), only 1 text block(s), carries a click-outward action, and is only 78 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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. (matched inside decoded stream)
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. (matched inside decoded stream)
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (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.
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0002.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x19FA	85 bytes
`embedded_file_obj0003.bin` `0cae1494b9c99505bf126e683a1a8be36bc8d5e793ab829e266d6e2fd62ccac3`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x1AAC	1466 bytes
`embedded_file_obj0004.bin` `705732d94baeeefac1bfc19c2a68ba348d12bb8c196aa44cf675635ce87d672e`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1D6B	9265 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`embedded_file_obj0005.bin` `f47c3dc8c4eeb64abc2cc332be719add15af6ce6dfdcdb477c08a1aefdbe7477`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x290F	11740 bytes
`embedded_file_obj0006.bin` `226eeacc5eecef2a05ca480f144ff6936594e20b5c7672e8f29f25c8bea65a56`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x2AD7	2928 bytes
`embedded_file_obj0007.bin` `4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x2E44	200 bytes
`embedded_file_obj0008.bin` `d51b9fc28b592405fb598e711d1495e1421571073bc2e8542d55389768716c06`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x2F37	835 bytes
`embedded_file_obj0009.bin` `e65f1e07bc965092b3153e64a1e8777a909cc47a98c0e2a10d38c47def2e6652`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x3110	291 bytes
`stream_002_off000003e1.js` `f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3E1	1532 bytes
`stream_007_off0000112a.bin` `8358d835225babc82acbcbbf2cb07512b8fb3772c5b46ff5956d2c6d02da8c39`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x112A	3024 bytes

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