Malicious PDF — malware analysis report

Static analysis result for SHA-256 e427e9b6d3578077…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 03323c2a05e082bde7c7c0454358135b SHA-1: e2ee60543a971baf6c6ae984ceab41a1f298c097 SHA-256: e427e9b6d357807760a8be9a125b27a40cbbd5d4dd3d21342145b40d2d5ff666
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/431946152/robux-rewards-game-hack PDF link annotation
    • http://digilib.stimata.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/5-games-that-give-u-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/counter-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-items-in-roblox-today-ultra-rare-and-new_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hack-robux-2021-apk_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-on-roblox-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/pubg-uc-price-list_GM1330123889.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/did-roblox-get-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-packs-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-dynamic-ship-simulator-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-without-survey_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_off00002fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9 22216 bytes
SHA-256: b80088751361db86a7312485667c746275052dea9a538e4336547b2661bc287f
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 18888 bytes
SHA-256: d95cefb3006d4ef95e53ac5fbb5a8f11cbb58a942c42ee634b0bbfc1c40180b1

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