Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a48d5fc3120da59…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 22:27:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 701ac1913a72512cc8ee21646a83b7e3 SHA-1: 680a017792210d6818dac72e37def15329c703e7 SHA-256: 6a48d5fc3120da59a781bb5f83d4893509a6d64336015cde6360717bc101d8ae
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free Robux and game hacks, directing users to a malicious URL. It also displays a fake CAPTCHA to trick users into further interaction. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/free-robux-games-that-actually-work-game-hack PDF link annotation
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spin-app-2021_GM406889139.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_004_off00005399.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5399 24468 bytes
SHA-256: d080f9eba74a1fe84a02df104821e70ba4c7d1eaf73b73ab11704ef48b18dc6e
font_01_sfnt_off00008b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8F 19392 bytes
SHA-256: 2bd118a57b53ff37cab680797aee460eb59fed046ceba4ed0277135d7eae5baa

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