PDF malware analysis — malicious · e2e3fef0b8cd9871

MALICIOUS

PDF

48.9 KB First seen: 2015-09-17

MD5: 17de557efb365a35c6c09a7f61a7db30 SHA-1: b2f90d768ae357c9b10ea6c9c77012fdadc40842 SHA-256: e2e3fef0b8cd9871fc526e8f53cbaddfcc23cf6b50dbc6afb5bcb594104ddcb2

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript

The PDF sample contains embedded JavaScript and utilizes XFA forms, both of which are common vectors for exploiting PDF reader vulnerabilities. The ML classifier strongly indicates malicious intent. While the specific payload or exploit is not discernible from the provided evidence, the presence of these elements suggests an attempt to execute malicious code upon opening the document.

Machine Learning

Nyx PDF Classifier malicious score 0.9064

Heuristics 5

Suspicious extracted artifact medium 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.
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (matched inside decoded stream)
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
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://www.bitstream.com In PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_cff_off00001a32.bin`	pdf-font-stream	PDF embedded font (cff) at offset 0x1A32	1138 bytes
SHA-256: `ea8f409c7366ed46eeb553aa7b404f04641f482ba88463fbe253da60be5787e5`
`font_01_sfnt_off00002241.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x2241	65932 bytes
SHA-256: `1f068d668b316fcb46f0801be00137fb749cc7fda5ca15e442829d6c303d8f99`
Detection ClamAV: No threats found Obfuscation or payload: likely Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)

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