Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd09bd3502014108…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 07:37:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 250b126218c49f6511364b60f422a751 SHA-1: 90bbc3a67852d5acd0fff89c7fcf025824b01b0d SHA-256: dd09bd35020141087d7f40dd789702d2fe81894fbfbea5fb7eb08cea5ccc78e7
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/406889139/cheat-codes-for-coin-master-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/roblox-free-stuff-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-cards-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-champion-shirt-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-tiktok-followers-instantly_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-royale-high-cheats-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-change-ur-username-on-roblox-free-nanoo_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/tycoon-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-roblox-the-streets_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.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_002_off000030c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30C4 23136 bytes
SHA-256: d80391ff85e04f0191096befbb95b98b993962c619bd18a4f3e5a6e6c113da87
font_01_sfnt_off000064f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 18336 bytes
SHA-256: 46a5dce1bcd15fef46771321b75302700fdbe642ab852c79c7094750b70fcfec

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