Malicious PDF — malware analysis report

Static analysis result for SHA-256 61f2e12a02995cc0…

MALICIOUS

PDF

39.3 KB Created: 2021-05-22 17:04:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aff3e70c6ed1bc34e170cdb7e45386e1 SHA-1: 2aac8e240cccf8176fab3276413eb82dcd0ea265 SHA-256: 61f2e12a02995cc0291c9e2ccac8e79e68afe46ff4dc275896a0ec6e8df85151
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/431946152/free-ways-to-get-robux-game-hack PDF link annotation
    • http://vibrato.fr/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://vibrato.fr/images/coin-master-hack-apk-download_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_off00003072.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3072 26444 bytes
SHA-256: 5cbd8f45a8adec94acfd1520e5a0d88df0d09b363d82f858d35075dea3bac695
font_01_sfnt_off00006c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C97 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00007681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7681 18724 bytes
SHA-256: 4748f019d46a9554f00c7c8cf9bb59ec204dfb95bc520e2d25b5a7c8ef81b270

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