Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f4812e770874f7…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 09:17:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 68fd2a3ea6b27333edfc4b7c9ed00d2a SHA-1: 48d295962f5974f0ef6f71c654364ec919890a9a SHA-256: 82f4812e770874f78db0a076023cc1c1d3452e68a67d7b391683a370eb13a13c
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/479516143/minecraft-windows-10-free-trial-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-robux-hack-no-survey-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/mobile4free24com-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-commands-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-robux-on-a-phone-easy_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-virtual-piano-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/hack-noclimb-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-jpg_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/robux-xyz_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_off00003076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3076 22092 bytes
SHA-256: 82fea560434c81b3b892b7545a770a4c4d17739bc21e5137cb5f7b59a370ced2
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 18884 bytes
SHA-256: a0946d741c75caf0365424744202d9dd02c4964339199d62fe769eb9e258c603

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