Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d183f17d38703c…

MALICIOUS

PDF

34.2 KB Created: 2021-07-08 13:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e78a5181d4d6c9c618b04e95823b104 SHA-1: db521e121a795dc14c6431f3ef3fc2b1080d59f2 SHA-256: 20d183f17d38703c8be3f1b19ddb47a36cc817c829e1c300908c0e80a6774fdd
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.tw/app/406889139/safe-hack-for-coin-master-android-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-free-roblox-skins_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/como-tener-robux-gratis-con-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-bluestacks-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/am-i-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-joined-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-items-with-roblox-card-walmart_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/script-executor-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/login-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-admin-no-download-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-verification-or-survey-2021_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_off00003049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3049 22676 bytes
SHA-256: 3ae56758e58d4e77c02c1d9ed124778318e18c38ef4b27a36466712dda8ee8c6
font_01_sfnt_off000062f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 18340 bytes
SHA-256: 43764a5b5f6c046282fd902f1ca36491120c09c6eac2ad81530e8a3df6adcbf7

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