Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b11e03e3811dc77…

MALICIOUS

PDF

34.8 KB Created: 2021-05-20 19:28:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 58193f51fc2c1f68da78d7f29f2d8a1e SHA-1: 250ba953ccfa97adc5a3039ef75294d6d8fb5184 SHA-256: 9b11e03e3811dc774e64386194343ad11a89e19ebdf6bc6a00b439dbab68e5f0
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/479516143/play-minecraft-for-free-on-pc-game-hack PDF link annotation
    • https://verstricktundzugenaeht.com/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://verstricktundzugenaeht.com/images/google-roblox-games_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_off000031cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CF 23540 bytes
SHA-256: 9318f4e622655704f51de94744564df0f54d159a12de99aa4a86ecbeb074d8b0
font_01_sfnt_off0000672c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672C 18116 bytes
SHA-256: 0a2b20ee34ef8ab862f65f7214c777895bcb00ebb57d072309a29ba65f102540

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