Malicious PDF — malware analysis report

Static analysis result for SHA-256 798c90df2779b471…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 00:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 01039218c0367596163c584fe9c184c2 SHA-1: 36d92b8c1cafff8cb2892f85d748a33212beb13e SHA-256: 798c90df2779b471da26547462916aee88994a4acbdeec94fa2a1900ac07cb77
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a high-confidence heuristic indicating it links to a game hack lure. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-cards-link-2021-game-hack, is presented as a way to get free items for the game Coin Master. The document body and numerous other embedded URLs reinforce this theme, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/coin-master-free-cards-link-2021-game-hack PDF link annotation
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin-grab-knife_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/comment-cheater-sur-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/free-robux-100-real-no-fake-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/paytm-to-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-comment-de-venir-un-hacker-lvl-2021-shinoby-life_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-free-no-download-or-install_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/how-to-hack-one-death-run-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/city17-city-rp-roblox-free_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-troll-players-script-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/free-codes-for-new-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • https://elearning.min12jkt.sch.id/__statics/gudangsoal/files/roblox-free-zombie-face_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_off00003334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3334 22800 bytes
SHA-256: 4519f07bd45281ab6e8890e44af325e87056fddb62f5b32245a8c19bef9c097a
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 18744 bytes
SHA-256: 30a2c575023908b4f2873a2c506cf1dd7d4cce6c2b03b20b5a33b18f82d0ec48

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