Malicious PDF — malware analysis report

Static analysis result for SHA-256 81afe667ffbb0ddc…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 22:13:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f611290013d8e249f9361c8a5d71d431 SHA-1: 736deb1e8cbadf8b04060c70063a5b55deab0fdd SHA-256: 81afe667ffbb0ddc89d3da314363a0f3af0c9c2c59bb1b62f75e4eac886f95f4
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/roblox-hack-thumbnail_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-202120210-woking-feb-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-human-verification-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/sbh-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-codes-for-tower-battle-simulater-in-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/i-love-cats-shirt-roblox-free-denis_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheat-roblox-phamtom-force_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-actually-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-person_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-accouts-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-adopt-me-money-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-almost-any-game-roblox_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_off00003532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3532 22120 bytes
SHA-256: 57c8e86d7f6e25f24fff7e5c81045f1be57caffb4dd68b6f2e8eb72c30b7065d
font_01_sfnt_off000065fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 18340 bytes
SHA-256: 43764a5b5f6c046282fd902f1ca36491120c09c6eac2ad81530e8a3df6adcbf7

Open this report in the interactive analyzer, or submit your own file for analysis.