Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e9c7bc563d75a3…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 05:46:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7480892b687afa8d67f4d6599fe753f9 SHA-1: 0aaee51db1927f0a5e24010f64923244aca2f83e SHA-256: b1e9c7bc563d75a3f8e6dcea805f0eaa42d31e414581b090a0f280d8667bcb2a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising 'free generator / game hack' services. The document body and heuristics indicate a lure designed to trick users into clicking these links, likely leading to further malware or phishing attempts. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-website-game-hack In PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-rixty_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/all-the-roblox-hacker-ids_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/hack-injector-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-hack-roblox-ninja-legends_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-free-admin-commands-in-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-on-cliam-free-robux-button_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/https-web-roblox-com-games-2021202187-free-join-now_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-make-ur-own-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://sponajaib.com/ckfinder/userfiles/files/roblox-royale-high-diamond-hack_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_off00002ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD0 21968 bytes
SHA-256: 0cf5023143c0cb35a3daa9784314fd7fd4243cb078da86982382156498eb8742
font_01_sfnt_off00005b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B6C 19136 bytes
SHA-256: 91d819a85e08464702b4d2399b2944ce52da70a48c8f9d70c1ee064a4c662f69

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