Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1646e5cb57be08…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 06:55:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0d5b8bdf049ea075fbbe9ef6b4256833 SHA-1: 178aba78d32b7c156589d66410e58aa6c2af3ecb SHA-256: 7d1646e5cb57be087f1e4c581785ab146d09f80e06e15097d03bc74b7a57ca10
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 0.9864

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 https://netcdn.online/app/431946152/free-generator-codeorg-roblox-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/pubg-uc-and-bc_GM1330123889.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-no-verify-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_off00005062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5062 26872 bytes
SHA-256: 88ba522f92f0609f68cb6b5bc611a18005939443f191e96d71fa359b466498a4
font_01_sfnt_off00008ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC5 18740 bytes
SHA-256: 6fcd48ac81876fd716b1b2fab8861c259fe75f5638e1070cdc467093908f1b26

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