Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b88c585d8bf40a8…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 17:16:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc4fcb886a06343122b1b2acb9b7b84e SHA-1: aa67c7b06da2f3fe91ab86a74c4d0263ec887726 SHA-256: 5b88c585d8bf40a8781c5eb8b0155620a3c48b59210b7e1337ba2d3251dbbcaf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' and generators. The primary link, http://netcdn.tw/app/431946152/roblox-executor-free-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a social engineering lure designed to lead users to potentially harmful content or further malware downloads.

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/roblox-executor-free-game-hack In PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/cydia-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/is-minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-to-get-free-faces-on-roblox-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/free-robux-website-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/claim-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/rbxboost-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/loki-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/roblox-for-free-no-signing_GM431946152.pdfIn PDF document text
    • https://elearning.min1sleman.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-hacks-august-2021_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_off00003463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3463 22240 bytes
SHA-256: ac2b65795137d05c5a6c9a73ebd02b1a61804aeed7fcb42fad171e9374589088
font_01_sfnt_off000065e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E1 18896 bytes
SHA-256: b9fa4116576953c5801b2f22b5c01864cd46e08fd89173683bf0373ba93b2fc0

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