Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacb6fec7ae63c15…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 13:09:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1d05fcca725b72250291e59ad71f1d6e SHA-1: 80749617cb49abf71cf45f50dbddc1f7fde53176 SHA-256: bacb6fec7ae63c158348015321c7d278ad1b780da4317c4703fe05ecaa7a28e4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for linking to a game hack redirector, specifically targeting Coin Master. The document body and embedded URLs reinforce this lure, directing users to the malicious domain http://netcdn.tw/app/406889139/how-to-earn-free-spins-coin-master-game-hack. This suggests a phishing or scam attempt designed to trick users into visiting a potentially harmful site.

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/406889139/how-to-earn-free-spins-coin-master-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-assassin-coin-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hacking-script-hub_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-install-free-song-to-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-spongebob-shirt-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/zeus-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/gameblock-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-download-on-ipad_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-web-page_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_off00003281.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3281 22732 bytes
SHA-256: 2653222677c1a963e4a0445a6a105e9e2f080494bffdda2eaecf3332c4f6c346
font_01_sfnt_off0000656e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 18336 bytes
SHA-256: c905eccb3c36daa1a0549475e4bb656fc6b9c30ab2dceb4a0e3afe454e535f17

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