Malicious PDF — malware analysis report

Static analysis result for SHA-256 b391dac028cf7784…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 12:53:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67b0520dc19685d9e3e3c16852a299be SHA-1: 7ec823ec81d38b393978ed7f0578df1e40a5f8cf SHA-256: b391dac028cf7784fd37c6d05171e32f5b90ff40ac6801c78ed45403c81a6170
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as game hacks and generators. The primary lure, 'cheat-in-roblox-jailbreak-wall-hack-game-hack', redirects to a malicious URL. The document's structure and embedded links strongly suggest a phishing or scam attempt to redirect users to potentially harmful websites.

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.co/app/431946152/cheat-in-roblox-jailbreak-wall-hack-game-hack In PDF document text
    • http://www.sfakia-online.com/images/robux-hack-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/robux-for-free-script_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-command-2021_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/roblox-weight-lifting-simulater-hacks_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-get-free-robux-no-human-verification-no-waiting_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/can-u-get-insta-banned-in-roblox-for-hacking_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-hack-roblox-accounts-on-pc_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/cheat-engine-roblox-super-speed_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/cheat-roblox-tower-defense_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/jailbreak-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.sfakia-online.com/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sfakia-online.com/images/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32F6 21676 bytes
SHA-256: c54c751fa6f0db63abcc464a604d7987c1baf035faf1102535c6185c0014b92b
font_01_sfnt_off00006273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6273 19408 bytes
SHA-256: 7fbd7ce87aff00ea7e511c42d159eb790a74032106a0c0289b257f683eed6bad

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