Malicious PDF — malware analysis report

Static analysis result for SHA-256 b09dcb8ab78ade3e…

MALICIOUS

PDF

50.0 KB Created: 2021-06-10 21:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3d0f856c9f40451dfc9afe662c5ecc90 SHA-1: d871d0868f0ae389cc2296b07bb297da4dd66971 SHA-256: b09dcb8ab78ade3eda5e6c181607d923e795805511e6302d6c0c5aeeb38675ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary malicious URL identified is https://netcdn.tw/app/431946152/hack-voir-information-personnel-sur-roblox-game-hack. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/hack-voir-information-personnel-sur-roblox-game-hack In PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-sword-fight-on-the-heights-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-female-outfits-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/roblox-adopt-me-bucks-generator-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-2021-december_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/roblox-hack-rebirth-in-ice-cream-simualtor_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-avatar-roblox-girl_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/free-robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn6tanahdatar.sch.id/__statics/gudangsoal/files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000556d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x556D 25424 bytes
SHA-256: 3d5ba8ad24fef0a8450bc3c4d01a700751a3f8e5570a9f00128b15a1903ccb13
font_01_sfnt_off00008ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF5 4712 bytes
SHA-256: dd74a8b9c186f1f92a4db1854aaa3722f4ab12064c16789b745c3019beea7236
font_02_sfnt_off00009e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8B 19096 bytes
SHA-256: 10b26048b1c9eab1fdf501ffafafd6fa5cbb644d8a73ffcfa7a29a09d62b3ca2

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