Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c9d34b68aaa12a…

MALICIOUS

PDF

42.7 KB Created: 2021-06-13 22:50:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c51678f1073663336ae438d0ccb977af SHA-1: d4b67f7a9c21017f935e33c9279225b93fdef900 SHA-256: 11c9d34b68aaa12a990909dd5cbe9e80aef3fd54844f72e74d8fbb71f1b9904f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a game hack and free spin lure to entice users to click on embedded links. The primary link, http://netcdn.co/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack, and numerous other URLs point to external resources that are likely designed to deliver malware or facilitate phishing. The ML classifier strongly indicated maliciousness, supporting the observed lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.co/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack PDF link annotation
    • https://pustaka.mic.sch.id//repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/yt-como-hackear-dragon-ball-galaxy-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/pokemon-go-free-leafeon_GM1094591345.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/cool-roblox-weapons-cheat-engine_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/chef-free-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-114-4-download-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_003_off00004a4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4C 24792 bytes
SHA-256: b8364901e998e39b32be28c2a03c0c4c4eb0c665c85b039352afaf8b3e03336b
font_01_sfnt_off00008259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8259 19036 bytes
SHA-256: a1db0e26d638f2546736f1f7b434dee98a1c5e726f40723477b7c203db66759e

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