PDF malware analysis — malicious · f01e56bf4fdeb799

MALICIOUS

PDF

596.2 KB Created: 2010-03-22 12:14:01 -04:00 Authoring application: Adobe LiveCycle Designer ES 8.2

MD5: c66396e556731bc354f5bdec9bd94fe0 SHA-1: b95c1405d108fdc8c3e3e1802230c9772d7c889c SHA-256: f01e56bf4fdeb799f24fa4dff67a64b76593a0fb5a37e57f6231b5a535fa2577

94 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

The PDF contains embedded JavaScript and an embedded file, strongly suggesting it is designed to exploit vulnerabilities and download further malicious content. The ML classifier also flagged this PDF as malicious. The embedded file 'embedded_file_obj0249.bin' is likely the second-stage payload. No specific family could be identified.

Machine Learning

Nyx PDF Classifier malicious score 0.6561

Heuristics 9

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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xfa/promoted-desc/

Extracted artifacts 20

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0013.bin` `707681ab686c938b2cfcc301c1476436d05eb4b637a0ceb3f84ce5a46a51ae40`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x68C	1909 bytes
`embedded_file_obj0075.bin` `4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1`	pdf-embedded-file	PDF EmbeddedFile object 75 at offset 0x5183	56 bytes
`embedded_file_obj0188.bin` `f7ee3ef2f8f35d669a6c2b8b0b0ee89655bbc3d04b107a8d22531830f6fc28a1`	pdf-embedded-file	PDF EmbeddedFile object 188 at offset 0x2A9BD	86 bytes
`embedded_file_obj0249.bin` `07f6a17a65d691d693c17a8d8f022b21c9d1567b2e64a29155f3ba7cc4aecceb`	pdf-embedded-file	PDF EmbeddedFile object 249 at offset 0x3215D	289965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 long base64-like blob(s).
`embedded_file_obj0309.bin` `ea932487190618598b516984a8a2f0ec8738d25384d26a49f55db2677e2df0be`	pdf-embedded-file	PDF EmbeddedFile object 309 at offset 0x40A04	1393 bytes
`embedded_file_obj0370.bin` `2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19`	pdf-embedded-file	PDF EmbeddedFile object 370 at offset 0x458C5	80 bytes
`embedded_file_obj0545.bin` `bc3195a0f6975c7414a17957c94a56dc7646b92934b0478c8ac7a9ab4f406fd1`	pdf-embedded-file	PDF EmbeddedFile object 545 at offset 0x8964E	1616 bytes
`embedded_file_obj0605.bin` `2d58413fda1ff20c994606823bf49e41194612c0137b6315e50fa7bdc01f1e09`	pdf-embedded-file	PDF EmbeddedFile object 605 at offset 0x8F818	2423 bytes
`javascript_obj0042_000.js` `f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8`	pdf-javascript-stream	PDF /JS object 42 at offset 0x2C1A	1532 bytes
`javascript_obj0103_001.js` `826c5622c798d67e5281cca7e05933dddc90ccdcb0a6177c9f7d06f11bef8f7f`	pdf-javascript-stream	PDF /JS object 103 at offset 0x61CD	2795 bytes
`javascript_obj0398_002.js` `4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb`	pdf-javascript-stream	PDF /JS object 398 at offset 0x46CBD	870 bytes
`stream_024_off0000c072.bin` `3849aaa28914e08e608524e4a3f1068792e87faf78ef933525771425768f0a82`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xC072	178848 bytes
`stream_087_off00051a9c.bin` `1e8564d3d89047875dccaa98279599de9d7ddf77240906041f1156ba8edf3315`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x51A9C	352198 bytes
`stream_104_off0008baf8.bin` `d5cb5eaa0ae2be42691a0b907f28365ec89e12abe112f088d959ce7bf58059e5`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8BAF8	30572 bytes
`objstm_0195_00.bin` `7f6501e96871f789be3bb0ffe4a9d085f596427d6118b4ace57cd157bbe59d13`	pdf-objstm-decoded	PDF /ObjStm 195 0 obj (inflated)	29185 bytes
`font_00_sfnt_off000071ef.bin` `7c417a1930ba82db8ca23330edc1d88c3bef0aeaf548d0b5207c32d21fc45466`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x71EF	26153 bytes
`font_01_sfnt_off00024e98.bin` `9c1736778d8905f958b5eb079ce943866407373d6f5eecd8e7b3d3dd5b4ad24d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24E98	40786 bytes
`font_02_sfnt_off0002e551.bin` `37cf5ae2c58a58613ffb3685e18a1c0192f8075d1fa35c9697c1902f6bff6daf`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2E551	21079 bytes
`font_03_sfnt_off0004b93b.bin` `df57e7dbe4730a1cfc953898017fa7a296dd490ca6175444343e039e09a88c93`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x4B93B	30053 bytes
`font_04_sfnt_off00084ddb.bin` `d1565d3e4e0d88b58ed08357eac343c8004d1ba06c8eacf004ca1e972d58397d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x84DDB	24856 bytes

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