Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bb3604fcbf70e46…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 05:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 54da9a8f55f34025a8747732814819b3 SHA-1: e686f55b98e7acbb5b04639749d03e7e3f5c6d15 SHA-256: 7bb3604fcbf70e46455aef7cddad44bd20f08a02a3ab698b4e2f9bd0967008b9
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 0.9832

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.online/app/431946152/how-to-hack-roblox-games-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-apk-download-v1-144-2-free_GM479516143.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_004_off000051ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51ED 27352 bytes
SHA-256: f12c9bc6dfa95814f3898f457ad9d78edc06bb204f37bb1254f0cbdd1a310b78
font_01_sfnt_off000091b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91B4 18608 bytes
SHA-256: f0530f62cc2e234d68a11618bd0f649c02fcf1ebf2f14054a2e3aba439076e74

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