Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c55205d887efb…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 13:07:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 64c9fd7d4e10a13c1aa72503636490db SHA-1: 8101f926265ee590d737ae9acfe5ea5f9830a3c4 SHA-256: b98c55205d887efb0cf12909b22e272ec033b8b9b7a42c630bf48a41db991107
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/coin-master-free-spins-link-today-blogspot-game-hack PDF link annotation
    • https://pustaka.stie-pembangunan.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-in-ar-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-cheat-level-200_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-hacks-on-mac_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.stie-pembangunan.ac.id/repository/minecraft-com-free_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
font_00_sfnt_off00002f20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F20 21988 bytes
SHA-256: 7fc3433df9b0dd38f497c9a10433d545a36e70df4f92e54877dc60ee0f46536a
font_01_sfnt_off00005fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD4 18988 bytes
SHA-256: 5be1f4e63a68f7f95930536f7900fd499aa82cc302806747a3bcc7f79712d029

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