Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd3a1f8effba22f…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 07:54:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a19ad7b5e4b67fb7eb69bf139de7b46b SHA-1: b2654d49a66551126d8d9c9b3b102ad9aaf60582 SHA-256: 1bd3a1f8effba22fab0e7aacbc5e793cbd88233a51896221347ac97fb1fb23a0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency and hacks, directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/free-roblox-accounts-with-robux-2021-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-update-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/can-i-have-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/pubg-uc-lucky-draw_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6A 24312 bytes
SHA-256: 51881a4ac39892a415433fa1d8540833f94072a42cdf09ed4eb791c996519b0e
font_01_sfnt_off000084ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84ED 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9195 19076 bytes
SHA-256: c054b0c192e62aa8d18573c4a3caef3c11adbf34d317da17e190ba3718f8ceb0

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