Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf9204f5e721357…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 18:23:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 55dd8284bf85580fb51e00dafc33990b SHA-1: 587b86b79871bb9b6697cf85390735af17fcd9bf SHA-256: 9cf9204f5e721357e9fffed5a8945d9bca61270cfc7ee2a2b6add42520ac468d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-hack-999999-robux-2021-android-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/rbxf-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-card-giver-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/draw-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/awesome-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/robux-generator-free-no-sruvey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-actually-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-server-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/money-woodcuting-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/earn-robux-online-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-yin-vs-yang-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-script-executor-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-make-hawt-sauce-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/bleu-roblox-mega-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-generators-that-actually-work_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_off00002aeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEB 22480 bytes
SHA-256: 4784d28c4c7e418bcaa59a354da3c735227dcdbad6c543f6e98a8922787ccfbd
font_01_sfnt_off00005c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C81 19656 bytes
SHA-256: 6c07d28c1b4276389cd3c9cf9c38e1f49d782a08d133a2e04d5e008f3ceded90

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