Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd0475d5c50a094…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 10:39:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9bdae0d88b9ec755db04d0e6e095b7c0 SHA-1: 826b02ec94e8c6d1770ce9d112633cbe37b7f9d5 SHA-256: 5cd0475d5c50a094a0e5a67e8ec95f80a25a345ef349881047591f8d103ce1e4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free in-game currency or hacks. The primary link, http://netcdn.tw/app/406889139/get-coin-master-spins-free-game-hack, is designed to lure users into clicking, likely leading to further malicious content or downloads. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to drive traffic to potentially harmful sites.

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/406889139/get-coin-master-spins-free-game-hack In PDF document text
    • https://eyeonhimalaya.com/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/tiktok-free-account_GM835599320.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/hack-pour-recuperer-sont-conte-roblox_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-bloxburg-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-hacks-to-buy_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://eyeonhimalaya.com/userfiles/files/roblox-exploit-download_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_off000036c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C1 23192 bytes
SHA-256: 061cccafe5cc42eedd3906f796526820bab595caf5bbc7824af07e9d72020314
font_01_sfnt_off00006adb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ADB 18176 bytes
SHA-256: 3c1755862e9d7b6c118913672ec91aceec4079bd066dd8ef58651bb045fdbbfe

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