Malicious PDF — malware analysis report

Static analysis result for SHA-256 1665407e9cf99d83…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 10:41:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3bd744b16d95ad7e620f2864af724bdc SHA-1: b62cbf6c09b2649b544d7381ccb52f2077889606 SHA-256: 1665407e9cf99d83a1223388cc10e1f1adac572d53075070cbfd0d1ea3a103d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to entice users. It contains multiple embedded URLs, including a primary redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-august-2021-real-game-hack, which is associated with malicious redirector infrastructure. The document body and heuristics indicate a phishing or scam attempt, likely leading to further malicious content or downloads.

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-free-robux-august-2021-real-game-hack In PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/robuxian-com-free-robux-code-generator-2021_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/robux-freebies-hack_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hack-arsenal-roblox_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/hackear-roblox-escape-prison_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/300-free-robux_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id/repository/free-promo-code-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/free-spins-coin-master-ios-links_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://libsmpn1balongpo.sch.id//repository/haktuts-free-spins_GM406889139.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_off00002fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA3 22248 bytes
SHA-256: e27fb7cfc974236697886280e6d5705c37085b130879c5a1bef4e0abfc85409e
font_01_sfnt_off00006101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6101 19460 bytes
SHA-256: c65622bb88aaefb15cc15e4cc44e73003eb561b2fbc8670f156d7e14a2c50cf0