Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c7e4a727bef7c3…

MALICIOUS

PDF

35.0 KB Created: 2021-06-30 02:37:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bfdc0404501cbb4c6ec069f8305054cf SHA-1: 18c0b8bb2a2a4bb1a976bae15d46076eb6996c2e SHA-256: b0c7e4a727bef7c339f50adf164b751e75f4c16457df9f095da69d1102bb1c8f
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.co/app/431946152/roblox-jailbreak-outwitt-hacks-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-roblox-hack-for-apocoleps-rizing_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/codes-for-roblox-weight-lifting-simulator-3-hack-code_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-flying-practice-place-roblox-a380_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-tix-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-giver-download-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-promocode-give-you-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheat-to-have-highest-rank-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-get-free-skin-in-roblox-2021_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_off00003082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3082 22460 bytes
SHA-256: cb5cbee5646ea16b63fc3dcd9e87e0679b61e8ac7b419f8ddf012a84dac17a70
font_01_sfnt_off0000629f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629F 19348 bytes
SHA-256: d4b2c7b41fce95488da832b1872a74f8b346b9029dd9d89b69bf564a01c2aec7

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