PDF malware analysis — malicious · ed3c5bb26ed5c0d1

MALICIOUS

PDF

1.32 MB Created: 2009-03-17 10:26:52 +08:00 Authoring application: Adobe Acrobat 8.1 Combine Files (via Adobe Acrobat 8.1)

MD5: 6ae6be0f852d3efe9ab5d736dfbb414c SHA-1: 9860c4f747540c4405f1766ec319be8d1d8967c4 SHA-256: ed3c5bb26ed5c0d158d3234490478251bae084ba380563c299561bdcc3578117

106 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits multiple suspicious findings, including embedded JavaScript and multiple embedded PDF files. One embedded PDF child was flagged with a high score due to multiple PDF_XREF_OFFSET_MISMATCH errors, indicating potential obfuscation or corruption. The presence of embedded files and JavaScript suggests an attempt to deliver a secondary payload or exploit vulnerabilities. The file is likely a dropper or exploit container.

Heuristics 7

Embedded PDF child has suspicious static findings critical PDF_EMBEDDED_CHILD_STATIC_TRIAGE

PDF contains an embedded PDF stream whose extracted child matches suspicious or malicious PDF heuristics. Wrapper PDFs are commonly used to hide the actual exploit or lure payload from scanners that do not recursively inspect attachments.
PDF paints image(s) but contains no text operators medium 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.
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
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 23

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`c993d.pdf` `1da31f2da0eb50631fc41c9247c56a219656035be1ae869b1860ca2ec00db61d`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x1F480	22610 bytes
`d13744.pdf` `ac5edbb87525d2f915fdc932a53ddd534e587789ae3fceec86f9c67a2ef3905d`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x29EBA	78126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 15 long base64-like blob(s).
`d13812.pdf` `1e2de5e89a69da3eaae116c2a847ba3a3318c665753305af9e73ed4ee02722ce`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x2F109	77926 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 long base64-like blob(s).
`d13915.pdf` `d108f7d742191a37a6d1b13145b51f2258e088bc4f19cd2fae7cef937ccf253d`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x39A1F	43771 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 27 long base64-like blob(s).
`d14402.pdf` `a74179a36b051f1d73e70dc9f729ff0233ab464367c2912475030d20f56ac8ea`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x45BC3	25354 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 long base64-like blob(s).
`c997c.pdf` `52e1336eb9f8d976c45abaee8802ba5be233867120195d048ccaa1ce238f535f`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x4C453	22420 bytes
`d13220.pdf` `173730b84ad71290f57c037f6ded3853c0444d6909ee06e103b66d53f6018386`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x51ADB	79469 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 60 long base64-like blob(s).
`d13855.pdf` `a40908cec89816d34cc72f7587717b0dae9426aa0a349246ec67f4778b5d8054`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x6149A	76766 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 34 long base64-like blob(s).
`d14401.pdf` `26d5ee1066fd08bbc4d81f556fd7cb495700cf57a93bdea9c329e449a35d555f`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x6C849	13364 bytes
`d12271.pdf` `23da8f446753bca4573fcb9360300be4b804d10e18d7ce4e2b1920b0d66b6d34`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x79758	32482 bytes
`d12391.pdf` `278d6f8e8ef4569935c6836d176dfc3ca2b0867105df94fd4fcc4835ab18c2b5`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x8095D	7619 bytes
`d13203.pdf` `1272b1af80709286f88b1dba3bda02de350a70501dfd11f7bfb6ef28e0fd7ffa`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x8F303	6932 bytes
`d13216.pdf` `fd1070305b85bfb63c26c617752ce2e2bc783983166f3cebb71f35439c0d7ef5`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x9C822	7987 bytes
`d13217.pdf` `853019c2989d61317dda3b1acca7390137a6b029f162bf20218d74c6755023ce`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xAB2BB	7855 bytes
`d13218.pdf` `7d81c311b546441e0bec7d78133351837d5fdb2996282db0e0c0b90f69c7ad78`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0xB989B	28113 bytes
`d13219.pdf` `73e7b6554975f1736c90bcc3d92d83e130dc5bfa639bba3664decd77c8d324c2`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0xBF942	5424 bytes
`d14403.pdf` `58b9fcb5491623b1875ef973c7b95ef9e55c77c461ed761dbd87cf8d9cf648e7`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x11DCDF	6687 bytes
`d14404.pdf` `e020548763cd11c25e8e900e8cb31f93cea080b09aef03acc32d6ab673f18118`	pdf-embedded-file	PDF EmbeddedFile object 19 at offset 0x12A9FC	6228 bytes
`d9414.pdf` `ba61161bd4ed8f92bdcfe653f2ce400633ee2e566cb7dbbd938480407cdd2f62`	pdf-embedded-file	PDF EmbeddedFile object 20 at offset 0x1363C6	5589 bytes
`d9843.pdf` `49da57cb951758d5d17dbbf3eaa69bcb0eade03fc28ae59b7e9f5efefeed2ac4`	pdf-embedded-file	PDF EmbeddedFile object 21 at offset 0x140020	9097 bytes
`javascript_obj0085_000.js` `97e6c8fb70f6fedab160a41095c99dce3c9d53a0086d3a8d4e6d47cbe03dce61`	pdf-javascript-stream	PDF /JS object 85 at offset 0x61D	1946 bytes
`stream_072_off0010df28.bin` `97f94a1cb585b77a49387474256cef2e611ecdad0222229bb00ff94c060aa1b0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x10DF28	9522 bytes
`icc_00_off0001e6ef.icc` `2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e`	pdf-icc-profile	PDF ICC profile at offset 0x1E6EF	3144 bytes

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