PDF malware analysis — malicious · 41364dd1895525d4

MALICIOUS

PDF

946.7 KB Created: 2010-06-11 23:23:27 +08:00

MD5: b26d1f115fac5de9304fc5bd158f9b25 SHA-1: 6685dc6f159971755eb5bd08812f1a6b72a48329 SHA-256: 41364dd1895525d42449e67f4a63b4d65fc736e3b2350f3f20fb63514cdda5bd

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and RichMedia (Flash) content, indicating an attempt to exploit vulnerabilities within the PDF reader. The presence of embedded files and JavaScript actions strongly suggests that the primary purpose is to download and execute a second-stage payload. While specific URLs for malicious content were not extracted, the structure points to a common delivery mechanism for malware. The benign URLs extracted are likely standard PDF namespace declarations.

Heuristics 9

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (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.
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)
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 1 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0001.bin` `84270147774bafb693cefa5666d1072d25266372a748def076468f6f646a453f`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x128F	163 bytes
`embedded_file_obj0002.bin` `a8b1b6c4a7495d6353e06643ee59323911843844524450bf1068d247661813e3`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x1380	1590 bytes
`embedded_file_obj0003.bin` `bce51576f361c2a5cb1b5786fb6626eb34a5bbe13e3cf964f10d091b40da35a9`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x167B	4747 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0004.bin` `e893fc6010e845f2d992671bea3fe5dbb18bd6d442b5e3f98d9a1f1599fafd25`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1EBF	199 bytes
`embedded_file_obj0005.bin` `c8a82f67dfd8d68c2f8fe494ca2deee4604701c8f02863bf87d222b992e45de9`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1FAD	2955 bytes
`embedded_file_obj0006.bin` `4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x2327	200 bytes
`embedded_file_obj0007.bin` `733f6d5b45b2367069129a768a516fb18c67d8eea786404ef5632cf493f4226c`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x241A	835 bytes
`embedded_file_obj0008.bin` `4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x25F2	56 bytes
`stream_002_off000003d8.js` `529357503ec67b623d2a12816cdeea62bd639f2b4ff4e568b01c96cc3f5bfc6f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3D8	1363 bytes
`stream_003_off000005b5.js` `e985b5df65c8c3cf732a9074b575fbc594c1c7f0bccc0994182ec7e5c0f7308a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5B5	902 bytes
`objstm_0046_00.bin` `76654a8c7f3db10d22b5fa1d52fd1e1da1b4bd281c96ca56b72ac17ad2ca1c62`	pdf-objstm-decoded	PDF /ObjStm 46 0 obj (inflated)	1805 bytes

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