Malicious PDF — malware analysis report

Static analysis result for SHA-256 d21b7b4620309735…

MALICIOUS

PDF

34.6 KB Created: 2021-07-09 18:17:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9f4b6a9af8f9723ca28ada064d23563a SHA-1: ac07024b3de95b6f1af1c029838a12b3522d5479 SHA-256: d21b7b4620309735274e6164118f117ec2361e66cff78bf2c5cd6e2cf5da7b75
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising free game hacks and accounts. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious sites. While no scripts were explicitly extracted, the PDF format itself can embed JavaScript, and the heuristic firings indicate malicious redirection.

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-accounts-for-sale-free-game-hack In PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-roblox-accounts-made-50-days-old_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-wall-design-hack_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-swoosh-hair-in-roblox_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/roblox-hacking-users_GM431946152.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • https://hotelyetihome.com/userfiles/files/free-robux-without-survey_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_off00003009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3009 22676 bytes
SHA-256: d4561774e185bd67274ff5705fb5e19a9d7557f2c90775ceaa6a30e8a10418a3
font_01_sfnt_off000062c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 18896 bytes
SHA-256: 419cb3cdc3e7cbb6ba4548049bcaf8f3e92c4ae134572e03770077cf2843ed8e

Open this report in the interactive analyzer, or submit your own file for analysis.