Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadbdb38a918888d…

MALICIOUS

PDF

61.5 KB
MD5: 751151d87c8ca10a506b6232d0df8c01 SHA-1: cef051f409f88d4585128ab5d66937672942ed4a SHA-256: aadbdb38a918888d0a098510d7593fbb4b816219328be5094e827151b3ab290c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers XFA form and eval() heuristics, indicating malicious intent. The embedded script payload is likely responsible for downloading and executing a second-stage payload. While specific family attribution is not possible, the techniques used are common for PDF-based malware delivery.

Heuristics 8

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
  • 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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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/2.6/
    • http://www.xfa.org/schema/xci/2.8/
    • http://www.xfa.org/schema/xfa-template/2.6/
    • http://www.xfa.org/schema/xfa-locale-set/2.7/
    • http://www.xfa.org/schema/xfa-locale-set/2.6/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xfa/promoted-desc/
    • http://www.xfa.org/schema/xfa-form/2.8/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000034a.js
f94e41f586bf3f20bc1deeac4bfbda388a61db43f25fbd6304ba73f5653368cf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A 1313 bytes
stream_003_off00000528.js
1b2ec98752b966f601d5223a750559cf13d562ac5e5c6d1fcc7217835b01f5fd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528 902 bytes
embedded_pdf_script_00001fa3.bin
e45f0db5444a350dc36906b62f13de3242a7bcc160612704abd60036808f4770		 pdf-embedded-script PDF raw stream script payload at offset 0x1FA3 14750 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
objstm_0039_00.bin
1ea3deb9e8fefd18545f049b32b3e41f97022417f1a40126c3434430380af6d5		 pdf-objstm-decoded PDF /ObjStm 39 0 obj (inflated) 1389 bytes
font_00_cff_off00000f11.bin
666463adac6cacb6e214e0e648c340c7321ba33bf110c46c426619784597d466		 pdf-font-stream PDF embedded font (cff) at offset 0xF11 1289 bytes
font_01_sfnt_off000068c7.bin
3a47365ba29be93b97be381e34ec3c7ef0a10e0f82cdb3dadd6fb11f2800fdb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 36717 bytes

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