Malicious PDF — malware analysis report

Static analysis result for SHA-256 f315dfc221c5b864…

MALICIOUS

PDF

37.4 KB Created: 2021-07-16 05:47:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b5fe5dbf9cce3a4ef20588997a3a6480 SHA-1: f20a1fa556798d5a8679a919ebf08927967b9dd7 SHA-256: f315dfc221c5b8642e26dd3bc7cd72efba5e6ca944ad949cd47ba2a3082c0c76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF with high confidence. The presence of these lures and malicious redirectors indicates an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

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.tw/app/431946152/free-robux-codes-game-hack In PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/el-mejor-hack-de-roblox-del-mundio-201_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/hack-roblox-robux-android_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/how-to-give-someone-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/roblox-pizza-place-cheats_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/cool-outfits-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/roblox-best-hack-clients-virus-free_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/free-roblox-items-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/how-i-get-free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/roblox-generator-hack-ml-2021_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/roblox-shirt-template-transparent-free-shipping_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/how-to-get-free-faces-on-roblox-2021-no-download_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/user-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.belajardaring.misnu.sch.id/__statics/gudangsoal/files/denis-how-to-get-free-robux-i-39_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_off00003c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C85 22736 bytes
SHA-256: b575119ac2892eaf5aac00e169f4502cc9539e2ae72143563e18f3a8054457e0
font_01_sfnt_off00006f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F76 18372 bytes
SHA-256: ebd16bed473c0d10154cd721ddc212c44ce3f73d33b4848c8fd41fc41acf3798

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