PDF malware analysis — malicious · 9a755c85d9149bea

MALICIOUS

PDF

30.4 KB

MD5: 975c48650f1ac3a4fb0d4c7e100ea711 SHA-1: 6efe0ad5114dccf02f3deef7d7be84138b03ffcf SHA-256: 9a755c85d9149bead31a805b1e1a10e011e24adf111162934d2df7e7a6d0ef17

272 Risk Score

Malware Insights

The PDF file exploits CVE-2010-0188, a vulnerability in Adobe Reader related to XFA forms and TIFF images. This exploit likely leads to the execution of a malicious payload, as indicated by the ClamAV detection of 'Win.Trojan.Agent-36103' and the presence of an embedded JavaScript file. The embedded JavaScript and file suggest a downloader or dropper functionality, aiming to fetch and execute further malicious content.

Heuristics 13

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.
ClamAV: Win.Trojan.Agent-36103 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36103
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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.
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.
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
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `e4ccc360253a5e9db82d0ebdcaba063728ee1bc69d407af733e896dbd3f1374e`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x404	13742 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0012_000.js` `784a3219af11daf98cf784bdaa900f32438c4c8b6061e0866e5c359d349d6031`	pdf-javascript-stream	PDF /JS object 12 at offset 0x6F71	8389 bytes
Detection ClamAV: Win.Trojan.Agent-36103 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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