Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c38137f12acae8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 09:46:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b6218102aee86a75d8442790e9ef0d2d SHA-1: ab117ba8ae9a151f8a7f5987d5f3c74d00ba168c SHA-256: 04c38137f12acae8582daa6e991f435fbb6ae3ad7639b52019aeedeac575512a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-dungeons-free-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/free-promocodes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-how-to-put-gear-on-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-accounts-generator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robloxgiveaway-xyz-hack-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-thumbnails-roblox-game_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-bucks-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-account-roblox-edit-this-cookies-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/html-robux-free-30_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/safe-cheat-ml-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-vid_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/download-games-for-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-manquin-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/fast-free-robux_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
font_00_sfnt_off00003159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3159 22416 bytes
SHA-256: 966fb5c5cdf7910094738723d20d28889d8d454b617de3abdc43c998d9d46cbf
font_01_sfnt_off0000630b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 18304 bytes
SHA-256: f6a577bc3f56294164eedaca4aa626844c61f0adb940d643d6f78e4abd993284

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