PDF malware analysis — malicious · 26bed62fd796836d

MALICIOUS

PDF

24.4 KB

MD5: d6626a64722851ed73f62ba4d297d3d3 SHA-1: 4f651485282eafe4c2700fe2fa1d4cfb2b548410 SHA-256: 26bed62fd796836d83b3643832a6ecdad249e9da68a2cfe4ea7380dbb701b7d5

312 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript and is configured with an OpenAction to trigger an exploit. Specifically, the CVE-2010-0188 exploit for Adobe Reader is detected, targeting an XFA image payload. This exploit likely leads to the download and execution of a second-stage payload, as indicated by the embedded JavaScript and the ClamAV detection of 'Win.Trojan.Agent-36103' on both the PDF and an extracted artifact. The presence of an embedded file further suggests a multi-stage infection process.

Heuristics 14

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.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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` `e8102a43052c6d96321b532c2f99a5f4a920eadac3964556b1fdf77a5f8c3748`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x39C	13742 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0012_000.js` `78af367b94c1fbc884572a85f9e28b3df7413cb8e4adf783519ae4588a1de39c`	pdf-javascript-stream	PDF /JS object 12 at offset 0x2E30	8387 bytes
Detection ClamAV: Win.Trojan.Agent-36103 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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