PDF malware analysis — malicious · 49d587d0e553b7bb

MALICIOUS

PDF

15.7 KB Created: 2011-11-14 16:08:31 Authoring application: FPDF 1.6

MD5: 6d46856827c28d7fbd29baabcd006a74 SHA-1: 009ab551ad65cf637301831a1dfdc2688f42be6e SHA-256: 49d587d0e553b7bb20f554f31f29264dbbf11153acf9f74f964dea935fc4633f

66 Risk Score

Malware Insights

MITRE ATT&CK

T1553.005 Mark-of-the-Web Bypass T1204.002 Malicious File

The PDF sample contains multiple indicators of malicious intent, including PDF_FILTER_HEX with exploit indicators and PDF_EMBEDDED, suggesting it is designed to deliver a secondary payload. The embedded file, 'embedded_file_obj0057.bin', is the primary artifact of interest for further analysis. The presence of XFA forms and AcroForm buttons further supports the exploitation vector.

Heuristics 6

JBIG2Decode filter medium PDF_JBIG2

JBIG2 image decoder present — historically used in zero-click 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
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
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0057.bin` `26944cb9cdf9e33e8c77d1066b3537792bdf95bd489f05a66f2aa60925f91edf`	pdf-embedded-file	PDF EmbeddedFile object 57 at offset 0xDD3	1188 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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