Malicious PDF — malware analysis report

Static analysis result for SHA-256 477dc2d7fcf411f2…

MALICIOUS

PDF

43.9 KB Created: 2021-06-09 09:15:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 25f79a56b2083c7da063092ba5432f11 SHA-1: daee02f397b0c0d086951465224654fbfb97c9b3 SHA-256: 477dc2d7fcf411f28e9f3bb8c07ddc5c85a4928a03c8fa11887c2efa70db8eef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, disguised as game hacks and generators. The primary lure is a link to 'free clothes on Roblox', which leads to a redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack to drive traffic to potentially malicious sites.

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/how-to-get-free-clothes-on-roblox-on-tablet-game-hack In PDF document text
    • https://gryps.de/images/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-any-roblox-games-unlimited-health_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-mad-city-roblox-menu_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/roblox-robux-online-hacker_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-tiktok-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://gryps.de/images/stella-roblox-hack_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/pokemon-go-free-and-switch-connect_GM1094591345.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/is-it-possible-to-get-free-robux_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_off0000513a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x513A 24056 bytes
SHA-256: dd01a84e40cba59c3d787b236b738ac13fa5c508a8956dd2a442149fd5626f26
font_01_sfnt_off000087db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DB 18608 bytes
SHA-256: 0d845107cbf666db203507cbcc917f09b02b15550e6dfbdde6bafae8f5dafcf7

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