Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d275aa8a40fe31d…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 06:58:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb8ed7bd9d002ec4216235c5d20dc3bb SHA-1: 43b032736eff0f48854c37751fd5177c8f277b2c SHA-256: 6d275aa8a40fe31d8764a47fbcd50dc8a270979d6535a41269d77339fa1719f1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow.

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.online/app/431946152/free-robux-codes-2021-game-hack In PDF document text
    • http://perpus.i2s-learning.com//repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/daily-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/minecraft-pocket-edition-free_GM479516143.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_off0000522a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522A 27044 bytes
SHA-256: a9967e13906b26d11abd1378529f4ab7e0aaae9a688158e56ce8bb2bb76fc121
font_01_sfnt_off00009061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9061 3560 bytes
SHA-256: f803daec1a885e666a83b71e2e588be6b0b36a5e244911e9b4dd372690a03624
font_02_sfnt_off00009c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C3C 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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