Malicious PDF — malware analysis report

Static analysis result for SHA-256 433707a51682c85f…

MALICIOUS

PDF

33.4 KB Created: 2021-07-07 14:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd586e357d7f4e3df72e559581e28b76 SHA-1: 992d920809429bf8e0a6a4531cc04c829601ff7e SHA-256: 433707a51682c85f8fb3306fd4404499dd1883dd5fc62c735b4e42d5f885618c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains multiple embedded URLs, including a critical redirector at http://netcdn.tw/app/431946152/free-robux-without-human-verification-game-hack, which is known malicious infrastructure. The document body and heuristics confirm the intent to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.tw/app/431946152/free-robux-without-human-verification-game-hack In PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-how-to-get-obc-for-free_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-recording-roblox-software_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-virus_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-cool-pants-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/block-hunt-hack-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-roblox-followers-bot_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/april-fools-day-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-lumber-tycoon-2-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/hacks-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/how-to-hack-into-others-peoples-acoount-on-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/www-roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-apk-hack-unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning-mtsn1pati.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-ios_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_off00002c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C22 21704 bytes
SHA-256: 9397e6d192f8d2955f56ddd3e09183212e8e2a37ffb621d3623a8636c8d1fde6
font_01_sfnt_off00005bee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BEE 19700 bytes
SHA-256: 8b14ee22fcfa25f62777b70428c8c13e08516b960c8f7fddc92c23ad02cefb37

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