Malicious PDF — malware analysis report

Static analysis result for SHA-256 b409b0978651062f…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 04:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c5fd7dc34af4f7af03e4e0fe35a56876 SHA-1: 74776148b223565bb395ab3fa60b726eae0651c3 SHA-256: b409b0978651062f6db8d9173ddd2fd53da5941129116be2feb511524ab6a697
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 0.9980

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.co/app/431946152/login-earn-free-robux-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/minecraft-116-1-download_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-password-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/conseguir-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/1x1x1x1x1-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/hacks-para-roblox-jailbreak-dinero_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/wahts-best-lvl-7-roblox-hack_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_off00002e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E06 22192 bytes
SHA-256: 0d353726d77ebd07ca78a32adf58e24e909c92bc5b0558e262056f60849cf78d
font_01_sfnt_off00005f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 18836 bytes
SHA-256: ebd7499721a6d12037c7f75918783adc4e62d01cd8e9ae73b58963c7ef5cbb5d

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