Malicious PDF — malware analysis report

Static analysis result for SHA-256 0441453b66a13eb9…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 01:26:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6bf1625c53631c38655284173d2d2b37 SHA-1: ac7d6184b725ef291d88ddfeef78d84f65cee025 SHA-256: 0441453b66a13eb91c25c96bc4686a24ed16fd0c93447f8538844dbadb459c90
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that are designed as lures, promising "game hacks" and "free generators" for popular games. The primary URL, http://netcdn.tw/app/406889139/how-to-hack-coin-master-pc-game-hack, is a strong indicator of a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence.

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-hack-coin-master-pc-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/get-free-roblox-game-plays_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/dabi-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-hack-into-roblox-accounts-using-a-discord_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-backpacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/descargar-roblox-hackeado-2021-ultima-version_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-gift-card-gewnorater-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-much-is-uc-pubg_GM1330123889.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/roblox-hacks-omggmh_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_off00003188.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3188 22616 bytes
SHA-256: 2621977ffdb3d7390096dfd1f91e5cfde9af5a30c7c5d3b1c836a1ba78a83d83
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 18320 bytes
SHA-256: 7b38b525648f52fd16d6e0e97132289892bc4925aa7b4ec9b918ecc376b61b1e

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