Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e6c5beb446a3e0…

MALICIOUS

PDF

37.6 KB Created: 2021-05-22 11:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 189020363a760a3a8b3fe6286537e92b SHA-1: c0a489c9f4026979fed7fa09904eddd592cc9a24 SHA-256: 24e6c5beb446a3e0500c52c8992ba311a7e0ccc0d1eb95ac33fdfdff0c59789f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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.
  • 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/free-robux-without-verification-2021-game-hack PDF link annotation
    • http://pa-kabmadiun.go.id/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://pa-kabmadiun.go.id/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://pa-kabmadiun.go.id/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pa-kabmadiun.go.id/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://pa-kabmadiun.go.id/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000331f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x331F 25696 bytes
SHA-256: 9a2fa6f507e8f07237dfed2664933e0009cafdb657a3590c667f8a8f89d11e92
font_01_sfnt_off00006e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 19368 bytes
SHA-256: a82984a519d7edf94c6531cfcf7f8df3cbe602e214b877051ae5dee029c294bf

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