Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a8247a4cf666fa…

MALICIOUS

PDF

47.5 KB Created: 2021-05-16 03:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b2d15c23756f1a5ac48512d605c0a649 SHA-1: f6af7615dd687f67bbedf48a37d16784536d1b50 SHA-256: f8a8247a4cf666fa51b766a35fd243da2bfe97d33704e7c773d75af5f29cc060
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting "free Robux" and "game hacks" to lure users. The primary link, https://netcdn.xyz/app/431946152/blox-supply-free-robux-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the nature of the links suggest an attempt to drive users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.xyz/app/431946152/blox-supply-free-robux-game-hack In PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/free-coin_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/generator-robux_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elearning.el-man3jkt.com/__statics/gudangsoal/files/apps-to-hack-coin-master_GM406889139.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_003_off00004c5f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C5F 25736 bytes
SHA-256: d76e5d211b306a1fb37853d23580f9d1f4b768cc2d665a9cd4d824224bae689c
font_01_sfnt_off000086bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BB 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off000096cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96CC 18444 bytes
SHA-256: 0902d75613bc39446e97d9d8a05e59c43b59cebedccbae9a4ab3fb6f34b2e91e

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