PDF malware analysis — malicious · 09e9c35468fe1dfa

MALICIOUS

PDF

151.9 KB

MD5: 1530f49ab1b81502a5d147bf20b1b9fb SHA-1: c986ce9e3ac20e891268f1ff5cd3d9feb7fdb924 SHA-256: 09e9c35468fe1dfa024c3b601073c48b1bd0bcfbfb8c6e069a0fb32fa5f352a0

174 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file that contains an embedded XFA form which exploits the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to execute arbitrary code, and the presence of an embedded file and a secondary embedded PDF suggests a downloader or dropper functionality. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

Heuristics 8

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. 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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.4/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0001.bin` `5efe0c17fe22991b1b4644bf0b008f13bb5d353a592b722da0bf1e25a2b539cb`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x51	13430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`stream_001_off00025328.bin` `9e64f05248edfbee7e64aa1ff5dd753e85e5497b7d1dd2db9704044673a012d4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x25328	13430 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`polyglot_child_pdf_off000252d7.pdf` `91b52dd0a9c9dcdcc0c36702bce49243703e00ec315755b6f069f5b5f8d61d03`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x252D7	3238 bytes

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