Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea380860c9c87212…

MALICIOUS

PDF

45.0 KB Created: 2021-06-10 18:16:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b88791dcb458588a8b76a934aca8ae7 SHA-1: ad36d5ff18d7a8dad493d0497f9c88e1d2de45df SHA-256: ea380860c9c872128a8e305df323bf3fed53ffbae2f688c8e872c21c8e26b375
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator / game hack' lures. The primary redirector URL is https://netcdn.tw/app/431946152/free-roblox-hack-2021-game-hack, which likely leads to further malicious content or malware download. The document body, though partially corrupted, also contains this URL and other similar PDF links, reinforcing the malicious intent. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/free-roblox-hack-2021-game-hack In PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-synapse-roblox_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/pokemon-go-free-862_GM1094591345.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://e-learning.manurulhuda-csp.sch.id/__statics/gudangsoal/files/minecraft-pe-apk_GM479516143.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
stream_004_off0000510d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x510D 25708 bytes
SHA-256: f3f995dcd2cfc5d46c3544b111be4d8c8cc21000b44534ee05f8f064540bc37d
font_01_sfnt_off00008bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEF 18748 bytes
SHA-256: 3cd8b762a16a7ecdcfc4c452c3578db6fae1e5cf48980fdef2196637d2834294

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