Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f89e2f9c6c6d03c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 18:39:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c31afac488c8b1257116633e5d0a300b SHA-1: 7dd2d2afba230dda3925a682a427a8d54ee7dc91 SHA-256: 8f89e2f9c6c6d03cb7f008cf41ad293a9a30e2f1d2604decc7e611580bbb4ff0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free in-game items, directing users to a known malicious redirector URL. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs and document content strongly suggest a phishing or scam attempt to redirect users to potentially malicious sites.

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-the-penguin-suit-in-roblox-for-free-game-hack In PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/youtube-live-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-app-download_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-free-spins-fb-champion_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-gratis-hack-android_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/pubg-uc-cheap_GM1330123889.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-generator-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-roblox-builders-club-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-bubble-gum-simulator-steal-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-may_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_off00003362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3362 22112 bytes
SHA-256: a5c82e45a399ad33bcad071ae24572ad7d001361d4c708c6bd72b5737cb85c8a
font_01_sfnt_off00006413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6413 19500 bytes
SHA-256: b8c08a36b1c12d6186955aa23758bb0cff6691d5d6dd13c3fec40d4d9b8186ed

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