Malicious PDF — malware analysis report

Static analysis result for SHA-256 91edf6206086f7e1…

MALICIOUS

PDF

38.7 KB Created: 2021-05-22 21:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f29b500259f477ceba4f7ad62246c824 SHA-1: aebc5e388ec80ad7733fca560e15b18470c31b46 SHA-256: 91edf6206086f7e19150245ccba71e60b6543911af2afc9f3d488253cdf3e63c
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 0.8060

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/406889139/free-spins-and-coins-for-coin-master-game-hack PDF link annotation
    • http://www.marambio.com.ar/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.marambio.com.ar/images/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://www.marambio.com.ar/images/play-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000349d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349D 24484 bytes
SHA-256: 84c5168e7131c8a8e597676e66664a5ff5afc22c1f59a5d170bb81b6c7657784
font_01_sfnt_off00006c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C90 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7641 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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