Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c99a7518dee065…

MALICIOUS

PDF

37.3 KB Created: 2021-07-05 14:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 27661dfcfb1b566e1a048177f9aa1261 SHA-1: 989319d67557352edd3c82ac1834b95c63bfcfab SHA-256: f5c99a7518dee0651caee168753027feec36874f5b5cb6e2ca38ab5d66afbcb4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free Robux generator" which redirects to the URL http://netcdn.tw/app/431946152/how-to-get-free-robux-games-game-hack. This URL is associated with a high-risk heuristic for game hack redirects, indicating a likely phishing or malware distribution attempt. The document body and embedded links reinforce this lure, suggesting the primary goal is to redirect users to a potentially malicious 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/431946152/how-to-get-free-robux-games-game-hack PDF link annotation
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/wurst-commands_GM479516143.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/roblox-new-lighting-gmae-free_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/free-roblox-members-for-groups_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-i-cheated-for-this-box_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/warships-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/roblox-4-all-cool-hack_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://e-learningmts.muallimienbogor.sch.id/__statics/gudangsoal/files/free-money-glitch-roblox-jailbreak_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_off000037dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37DD 23264 bytes
SHA-256: 892cf1ded26aa5e6dfddad77a96373fa85dfe98cc2a855db537ea3859c9c84aa
font_01_sfnt_off00006c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 19244 bytes
SHA-256: b8c2daca9de1ad1f1abd6b245aca9824e0b7759a36d278cdc1c8b4996df9d835

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