Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fa89351e49fbf7…

MALICIOUS

PDF

35.3 KB Created: 2021-05-21 18:32:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: da3c9868bda4590cc4aad663cb78444e SHA-1: 186ac67f1f8f85dea54c70e734bded82fdd61d3f SHA-256: 89fa89351e49fbf70f4e7ecce48139b35397d248066cae17c17999dc3eed1232
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 0.9648

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/835599320/free-tiktok-fans-no-verification-game-hack PDF link annotation
    • http://babyxpress.de/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://babyxpress.de/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://babyxpress.de/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://babyxpress.de/images/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://babyxpress.de/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.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_off00002e9f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E9F 25904 bytes
SHA-256: c179d3605bd9058cf81dc8d0450c21bb914b13f84c2163a41a7ff2bf272c7a57
font_01_sfnt_off000069cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CB 17816 bytes
SHA-256: db30cff21771a834018d301e3e15668d4f696dd14c251b75c79f93eed26cd5f9

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