Malicious PDF — malware analysis report

Static analysis result for SHA-256 e53c838b81b74825…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 18:20:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2d5ba373a0b20ab6543e5704930a3c48 SHA-1: 1793c09e11884932d0907f7e3dea7b9396cd5eaf SHA-256: e53c838b81b74825fc39d4f9677ef0a99fa1b9a80e6c755ba435a515f69f2713
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/wil-they-cheat-roblox-thumbnail-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/roblox-codes-for-free-stuff-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-things-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hacks-forbee-swarm-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/dbz-rage-roblox-stats-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-roblox-admin_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-golden-suit-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-copypasta_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-make-a-badge-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-cards-and-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-for-kids_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_off00003332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3332 22180 bytes
SHA-256: f6d7ab5023db5c14182496ab6b7ca9ef62934af34cd8c2b3c3fcc00c4178f600
font_01_sfnt_off0000645b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645B 19656 bytes
SHA-256: ded5606979abdc41567d1af83e02e23ca731b42c3ed6568f2f3cd5af643c7f2d

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