Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced12a5b29065d29…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 03:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ac3b46730b72b07e25c4156337b74d05 SHA-1: 4fd91212892d9f3d36bac3f1decbbff6a9debce6 SHA-256: ced12a5b29065d29100e573e5f5593464242be4df920f056b2d640f93a89e552
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document uses a 'free game hack' lure to entice users to click on an embedded URL. This URL, https://netcdn.xyz/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack, is flagged as malicious and likely serves as a redirector to a second-stage payload. The presence of a 'download button' lure and instructions for a password-protected archive further suggest a malicious workflow designed to deliver malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0115

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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://netcdn.xyz/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35F9 26220 bytes
SHA-256: 750391dcea4240bf627ef5409c6c3712fe8df735cc7e0eb48bdda98a7e24e8da
font_01_sfnt_off00007223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 3964 bytes
SHA-256: f6b9a386ee4e0aff622a98b2230905da71eab0ca98398cb52018fda3528d3e2a
font_02_sfnt_off00007f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F80 3396 bytes
SHA-256: e59bc53cd4c0ee65dc1533becad2866f345dcb060e6c68bb8187d21cb9f973ee
font_03_sfnt_off00008b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09

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