Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c31bf006b2bd4ef…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 01:32:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9dd2aeae29b1d44ccf6a89d5a49cb02c SHA-1: 1a5d1223949de1e78f2b5542bb6b26850c95aa95 SHA-256: 2c31bf006b2bd4ef470246fc38ffc7e78813960e2e1837d175b7cceaf2d1db92
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 0.9865

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.online/app/479516143/minecraft-bedrock-client-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-free-100-views_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hacks_GM406889139.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_004_off000051f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F9 24568 bytes
SHA-256: e5b35c1ab58a9aa2f68cc9649ffe653ed6e68ee291cf330ccd1c36437a02ed17
font_01_sfnt_off000089bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BC 18344 bytes
SHA-256: c9cb66d1f867d8d8b778a8f6a6e4b7827efe3961d145c36f38d04236c8971b27

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