Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd147fe90cbdd2cf…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 06:24:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b647f98e013bac93b97419029120787f SHA-1: 75e9b92ffc06c5f5a9a2bcbd98f716920b498fd1 SHA-256: bd147fe90cbdd2cfc5575ee293d46af5ea372bed72dac75d022c6c22ea77a975
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses a clipboard-command (paste-and-run) lure. 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 0.9864

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/479516143/minecraft-java-edition-for-free-game-hack PDF link annotation
    • http://perpus.polbitrada.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/wizard-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-game-2021-free-spin-link_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_004_off000051e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E2 27740 bytes
SHA-256: ca2f6a6677bf20ece48a24b3ec834c772a3d62dd0a9d5158ecc949a288bfbc52
font_01_sfnt_off00008ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC2 18164 bytes
SHA-256: e28d0ded599416f75746d42b4ddd49ac4ed584cd54835945167b34c6d366202b

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