PDF malware analysis — malicious · 36c9140bc7e6456c

MALICIOUS

PDF

1.36 MB

MD5: 4429f77b2d25401620d307feed5e6ba3 SHA-1: 75394d2e58ea9bf5058a303c0c3b9f15cf660be0 SHA-256: 36c9140bc7e6456c015c80827818307e3bb5ef2875eeca719f6e9f505e394276

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous JavaScript streams and exhibits characteristics associated with exploit preparation, specifically related to CVE-2010-0188. The presence of embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS', suggests an attempt to execute malicious code. The high stream count also points towards obfuscation or heap spray techniques common in exploit delivery. While no specific URLs were flagged as malicious, the overall structure and embedded scripts strongly indicate a malicious intent to leverage a PDF vulnerability for code execution.

Heuristics 7

CCITTFaxDecode + TIFF/XFA exploit prep — LibTIFF CVE-family indicator high CVE related PDF_CCITT_CVE_2010_0188_RELATED

PDF uses /CCITTFaxDecode together with TIFF/XFA exploit-preparation markers such as rawValue image-field assignment, TIFF data, or heap-spray JavaScript. This matches the delivery pattern for Adobe Reader LibTIFF/CCITTFax parser exploit families, including CVE-2010-0188, but does not prove the exact malformed TIFF primitive.
Unusually high stream count medium PDF_MANY_STREAMS

PDF contains 501+ stream objects — may indicate heap spray or heavy obfuscation
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)
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.
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/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_004_off00001bef.js` `01ecf8adb04541a4523d366e0c9ae0e3fb6a693d673717f9a78bb5a5950d823e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1BEF	2120 bytes
`stream_009_off000025a2.js` `58647920caf9dcb562a842bc0e972eac61066bce0d04a45ac398ee2568ed8227`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x25A2	52308 bytes
`stream_010_off00003cac.js` `c835dc232ea87b2feebb15867d10c455975e237c2611acbc10b5ef6da7a58e82`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3CAC	394 bytes
`stream_013_off00004cb3.js` `92674dc4e1a944ca837fe4a014b5d8fe0018600f3d3a3f8fa9bca36102d27569`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4CB3	887 bytes
`stream_022_off00005b2e.js` `6cf864f0861d6c0ed2821c9af39a70ec9740bf8265b087d1fed3cd4749a08e41`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5B2E	630 bytes
`stream_025_off0000607a.js` `ad9f9460bbd466416c505a21246ca6402cd4ff11034a046c394d87f34489eda4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x607A	635 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`stream_028_off00006498.js` `8c06a3684e854306814ac809869afebd45be1b057b891eb2a3c34be21db81f44`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x6498	627 bytes
`objstm_3453_00.bin` `fd71c94dc8896719eb4210798562ef266e103b4b4273a1fc12cf6e8e38ac5459`	pdf-objstm-decoded	PDF /ObjStm 3453 0 obj (inflated)	16963 bytes
`objstm_3454_00.bin` `4f3c87a70c1a1cdca07a9ed083cc9f8eaab9265594cc058134d8fee82ae86b57`	pdf-objstm-decoded	PDF /ObjStm 3454 0 obj (inflated)	19658 bytes
`objstm_3660_00.bin` `fd1733d006c72b38ef8f2e5da564b991070a15602631fcf0e39c3ac8375f1e1c`	pdf-objstm-decoded	PDF /ObjStm 3660 0 obj (inflated)	3935 bytes
`objstm_3026_00.bin` `223f9fd4e09a9cc555cc42b608fd841a31ec6c382c81b913d1230db81e8c9d47`	pdf-objstm-decoded	PDF /ObjStm 3026 0 obj (inflated)	10410 bytes
`font_00_cff_off001476ee.bin` `e4569b775ec48290398265e6f0c98af7495d76ae4ee2151a737317ec156b66b8`	pdf-font-stream	PDF embedded font (cff) at offset 0x1476EE	85600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.44, consistent with packed or encrypted content.

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