Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f30989d8215cc93…

MALICIOUS

PDF

36.5 KB Created: 2021-07-06 12:56:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff0b60b894397d19a4cbd2a7aa1aac21 SHA-1: 46d51abc5c0a667d703209564c2475e33cd3a5f6 SHA-256: 8f30989d8215cc93fd8768a8ce169de1d2f2462db104ff070da8f3ddda0aac83
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-daily-free-spins-link-2021-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/vechile-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/tiktok-par-free-followers-kaise-badhaye_GM835599320.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/cheat-indetectable-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-sex-script-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-attack-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-model-virus-script_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/fbchampion_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_002_off000035c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C0 23000 bytes
SHA-256: 44978eb00dfd07a50103672804f5ed8341738e71173a6dbafaced83c9781eec5
font_01_sfnt_off00006978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6978 19168 bytes
SHA-256: 84c37497ea3199e4eb4935d9e68ab24163eb72568577da040a17a4be5b808e19

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