Malicious PDF — malware analysis report

Static analysis result for SHA-256 3920bdaf7994d0fb…

MALICIOUS

PDF

35.9 KB Created: 2021-06-27 23:37:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 32c1d24b0062542b8760a98879031581 SHA-1: 1f0ff697ac280e401a00f443f3077b1f4b45fba4 SHA-256: 3920bdaf7994d0fb1fa4d70b09af4958f7e629dfa9ccdc95f364d60c01705d44
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector service that ultimately points to a 'Roblox hack' lure. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a download button lure suggest an attempt to trick the user into navigating to malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/its-works-roblox-hack-game-hack In PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-tiktok-followers-generator-no-human-verification_GM835599320.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-20-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsn2kotapalu.sch.id/__statics/gudangsoal/files/how-to-sue-roblox_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
stream_002_off00003527.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3527 22468 bytes
SHA-256: 6ee36e1936dbc64b9b3c15644b9796b4372508290c2d4ae12c038713f17d2ad7
font_01_sfnt_off0000673f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 18960 bytes
SHA-256: 24d60718ac256f33e2f5e3fbb778809d4b84e5fd07fc519e0c569ec8afb3220a

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