Malicious PDF — malware analysis report

Static analysis result for SHA-256 233c6e133c65aea3…

MALICIOUS

PDF

35.8 KB Created: 2021-07-01 08:49:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 07131606e5855027ae0afd8f5013a7e3 SHA-1: 0a0f3133d2fc554dc1354c8b831b53c0db27f031 SHA-256: 233c6e133c65aea3f55a0749dae9aa12acb50b03213b90c1fe8dcae15262f5ae
160 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to malicious infrastructure. The primary URL identified, http://netcdn.co/app/431946152/how-to-get-unlimited-robux-for-free-with-copying-notes-game-hack, is flagged as a known malicious redirector. The document body and heuristics strongly suggest a phishing or scam attempt to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/how-to-get-unlimited-robux-for-free-with-copying-notes-game-hack In PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-roblox-places-download_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/visite-roblox-robux-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-back-my-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-buy-anything-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-ninja-animation-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/wwwhacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-free-muscle-shirt_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-secret_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-lvl-7-script-executor-free_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/web-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/get-free-robux-no-human-verification_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_off0000306d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306D 22696 bytes
SHA-256: 7d7bb03e9f6f294a135b44023ea7bcbb29467d605815f4d043c031cf30202e82
font_01_sfnt_off00006355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 20332 bytes
SHA-256: 3807b0a2cd9972eb265f606ae41d905f06fce2621497a67f0ecd0fd80e3fbe58

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