Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61d9ee37b301f20…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 00:30:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e89ca9fcab20b4cea73af305d441c42a SHA-1: 2fda5a024e6cdc83ab114cd80bdbf5a237732550 SHA-256: b61d9ee37b301f200f63e118458aeff3cd415c586ccd3c2ec9ba6d1e4366b254
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'game hack' and 'free robux' lures. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the document body content strongly indicate a social engineering tactic to trick users into visiting malicious sites. While no scripts were directly extracted, the nature of the lures suggests the linked URLs likely host further malicious content or phishing pages.

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-mod-apk-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-protosmasher-download-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-games-on-roblox-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-game-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-holy-sword-cheats_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/como-tener-robux-sin-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-get-robux_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_off00003074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3074 22896 bytes
SHA-256: d89ee8edb4926985c378b74adb35fec4c2e290b784c2b247cccaa14b539ba66b
font_01_sfnt_off000063eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63EB 18352 bytes
SHA-256: 8921705bb0180ef928bfc54a8bff441144a325a835df77ae2345570de02769c4

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