PDF malware analysis — malicious · f4a350ce9073750b

MALICIOUS

PDF

353.7 KB Created: 2008-01-05 16:25:50 +01:00 Authoring application: LaTeX with hyperref package (via pdfeTeX-1.21a)

MD5: 350a44783fa8d783815e2c1ea928c511 SHA-1: e4d413cdfc115b9a4b73f8c220f818cdd9092301 SHA-256: f4a350ce9073750be18ccac82703ac93ab55d74863da1af6c87c6fb9a1932b93

104 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_U3D_CVE_RELATED heuristic suggests exploitation of a vulnerability related to Adobe Reader's 3D content parsing. The embedded javascript_obj0048_000.js file is likely responsible for executing the malicious payload. The file's structure and heuristics point towards a malicious PDF designed to exploit vulnerabilities and deliver further malware.

Heuristics 8

U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
Secondary embedded PDF body has suspicious static findings high 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.
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.
External URI info PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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://vcg.isti.cnr.it
- http://meshlab.sourceforge.net

Extracted artifacts 9

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0048_000.js` `aedb89e86f67d5528d3fb0953bc008502f8105dec0de594c0f33e0926857c063`	pdf-javascript-stream	PDF /JS object 48 at offset 0x32039	8192 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`stream_000_off000002ad.bin` `b1f937b9541d599e1c6000c4c47f7f3f21a4d9b0e1051c8a5580e07bc6106afd`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2AD	177792 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.72, consistent with packed or encrypted content.
`font_00_type1_off0002ac27.bin` `d129a586d7449f3004ab2629e1b01753002037f8ca955d68339aba6fea13d9dd`	pdf-font-stream	PDF embedded font (type1) at offset 0x2AC27	6428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.55, consistent with packed or encrypted content.
`font_01_type1_off0002c3ce.bin` `6d68a200ddadd677e7031f9795a017ce42b4d7f02b68d39a072ecbc1e20fb5d6`	pdf-font-stream	PDF embedded font (type1) at offset 0x2C3CE	7849 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.64, consistent with packed or encrypted content.
`font_02_type1_off0002e1fc.bin` `f1d06dc0327817e03d778a88f65436557134c269106fbc5438dd4ef0c897a441`	pdf-font-stream	PDF embedded font (type1) at offset 0x2E1FC	11287 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.76, consistent with packed or encrypted content.
`font_03_type1_off00030c39.bin` `cab7a46a0f2b73639fc37aa221b515da6888b096748ee89dec2f4876e25f7f1f`	pdf-font-stream	PDF embedded font (type1) at offset 0x30C39	2374 bytes
`font_04_sfnt_off00044e0c.bin` `6cf3120f2fd029ffa915b101efc9c0a29c617cc9360b40a17a9e406587e9ff80`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x44E0C	244600 bytes
`font_05_sfnt_off0005375d.bin` `7f71f11acb3885da2b9d6d861d286b338dccb284a862bad8118ba40ba79d349a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x5375D	36364 bytes
`polyglot_child_pdf_off000438dc.pdf` `83a68c5dd26544c3158f62ed03e44214c92e020e8f5e690865733932cd20bb80`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x438DC	85525 bytes

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