Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcf3d582dc46307…

MALICIOUS

PDF

35.0 KB Created: 2021-06-28 10:57:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c846701d937b9f2ff7474c93620064c6 SHA-1: d06490a91a726e8331f9eb394fedb15a4947349e SHA-256: abcf3d582dc46307914cda73338347bbbb266ec0b7045531f1be8538df2bd59a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a prominent link disguised as a 'free generator / game hack' for 'tons of robux', which is a common lure for scams. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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.co/app/431946152/tons-of-robux-for-free-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-money-on-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hide-and-seek-free-online-game-for-kids_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacks-counterbloxrobloxofensibe_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-download-roblox-infinite-jump_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/fastbux-me-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hacks-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-counterblox-hack_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000325a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x325A 22668 bytes
SHA-256: 74be55fbbc3cb31bc9d24cacbb3fe1ecc58654f935d2a6efe1429b155b1b93ff
font_01_sfnt_off000064d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D7 18716 bytes
SHA-256: d57db93e4525943bde30b225ee42dd76f297489b4812e7cea35dab32388773bb

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