PDF malware analysis — malicious · 9b669a54fc9cc638

MALICIOUS

PDF

511.0 KB Created: 2010-09-16 17:24:37 +08:00 Authoring application: pdfFactory Pro www.fineprint.cn (via pdfFactory Pro 3.35 (Windows XP Professional Chinese))

MD5: 497b48b5b4d39a6dbb721ed1d910722c SHA-1: e41a026fd7052458b4d51ae0b0e4c22426e237ac SHA-256: 9b669a54fc9cc638a40878a229dfe80d8f1a00c3fc2d19975b44dcb3ca9bf2f0

214 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

This PDF file contains embedded JavaScript and exploits the CVE-2010-2883 vulnerability in Adobe Reader. The presence of multiple JavaScript streams and a secondary embedded PDF with similar suspicious findings indicates a deliberate attempt to deliver a malicious payload. The unescape() function and ASCIIHexDecode filter are commonly used for obfuscation in such exploits.

Heuristics 10

Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883

PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
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
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/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xfa/promoted-desc/
- http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/
- http://www.xfa.org/schema/xfa-locale-set/2.7/
- http://www.xfa.org/schema/xfa-locale-set/2.6/
- http://www.xfa.org/schema/xfa-form/2.8/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0026_000.js` `2f574ea0a0abb643798c6edf545b9a2510056a799ef48c2f415cee8e337043b2`	pdf-javascript-stream	PDF /JS object 26 at offset 0x47BF	9909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`font_00_sfnt_off000149fa.bin` `422bc5698ba5d9d4818f6a2d8b3abca2f723e713b44a15c390139d2c976a1388`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x149FA	65932 bytes
`font_01_sfnt_off0001e85c.bin` `7e24ee16c8b09ee74d61445f29c3c0a95abfdf17fc1008606394f159dbd0c106`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E85C	65932 bytes
`font_02_sfnt_off000286ba.bin` `57e24925bc6bdb98d38e8b4ba3b87f80f75c5e49ea9a522486790d7dc6848549`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x286BA	65932 bytes
`font_03_sfnt_off000324e1.bin` `1f068d668b316fcb46f0801be00137fb749cc7fda5ca15e442829d6c303d8f99`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x324E1	65932 bytes
`javascript_obj0026_000_1.js` `a2b790f4d6de1297987c8d3e8f85a5f2c2643abf88ecd4bb21200b03db54bfee`	pdf-javascript-stream	PDF /JS object 26 at offset 0x47BF	8527 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0026_001.js` `4e8a1391d3e126a562753695ad62bd7ddb97d0ff21f71fea16e494af3c353aa2`	pdf-javascript-stream	PDF /JS object 26 at offset 0x47BF	3369 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`polyglot_child_pdf_off0003ca8f.pdf` `93d8cc8d25b124fb18681351b29487196c12e45397a731d9c44a61596694cb96`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x3CA8F	274815 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).

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