PDF malware analysis — malicious · 8ecad6002a4dd99a

MALICIOUS

PDF

79.6 KB First seen: 2024-06-13

MD5: 02486c2c87d00f4f6d2332a942eb7c32 SHA-1: 31de3b4b6054599b7ec422cda6ca1090b0d122d5 SHA-256: 8ecad6002a4dd99a94fe7b134c5dd7308b9d2156726be0968419ded1e7a429ae

130 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains JavaScript that triggers an auto-open action, displaying a fake Acrobat update lure to trick the user. This script also contains a URL that is likely used to download a second-stage payload. The presence of JavaScript and a fake update prompt strongly suggests a downloader or droppper malware.

Machine Learning

Nyx PDF Classifier clean score 0.0006

Heuristics 8

PDF auto-runs JavaScript form submission on open critical PDF_OPENACTION_JS_SUBMITFORM

PDF uses /OpenAction to run JavaScript that calls submitForm() with an external HTTP(S) URL. Opening the document triggers the outbound submission path without requiring a normal link click.
PDF JavaScript shows fake Acrobat updater prompt high PDF_FAKE_ACROBAT_UPDATE_LURE

PDF JavaScript displays Acrobat/update-themed language such as a document rendering engine update or remote connection to Adobe servers. When paired with JavaScript or external submission, this is a social-engineering lure rather than benign document text.
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)
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
External URI info PDF_URI

PDF contains an external URL action
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 https://www.dynaforms.com
- https://mazcdn.studiwag.top/bowRuxFV
- https://34.75.2O2.lOl/XTURkSFZ6TldTVGsxVG5KUFZ6YzVXaTlIWm5OS1UzTmljMmxJVjJ4SGNFOUxaMDVyUTNabFF6VndWMDUwTTNKMVVtWnVhMjFEVmxkd2VsQnZWRkp5ZUhaa2VpOXlRVGw1UjJ0UGFFRnVPV1ZUT0U1bGJYTkJaM3BRZVRWRmRqZGtVSGhzZEdoNGJWZ3JTMmM5TFMxUWJXRm5MMjVsTkRaaFMxaGpjUzlQV2xwYVIyUjNQVDA9LS00NDdhYTdmZTBhNDk2MGQ2NzU1ZjUxYWRiNDI2OWQ4MjdmNmY4ZjRl?cid=1266908717#FDF
- http://ns.adobe.com/xap/1.0/
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- https://www.example.com
- https://workonwheel.ac-page.com/s
- https://sharedfiles.ac-page.com/s
- https://workonwheel.ac-page.com/no

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_011_off00012ca6.js` `340570d67415ae35ea022c13049d9fecc92603108904c0157dae688c243a74a8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x12CA6	592 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`objstm_0042_00.bin` `eec484dabbbeaabf7d015a3eaf06cfb4b8fdaa24275c2ccc88869561e6a59ae0`	pdf-objstm-decoded	PDF /ObjStm 42 0 obj (inflated)	8914 bytes
`font_00_cff_off000004b6.bin` `9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0`	pdf-font-stream	PDF embedded font (cff) at offset 0x4B6	4575 bytes

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