Malicious PDF — malware analysis report

Static analysis result for SHA-256 040106bbf5f2d3f4…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 00:06:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 90c1401d54c50b96a705c4e153ea4500 SHA-1: 6f41fed581d20252b0167860f7b9925b7a79eddb SHA-256: 040106bbf5f2d3f4e58df62d44bb8b40549d48a4f6cf3a482c8e73b1d0e064db
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector, masquerading as a 'free generator' or 'game hack'. The document body and heuristics indicate a lure for users interested in obtaining free in-game currency or cheats, which is a common social engineering tactic. The primary malicious URL identified is http://netcdn.tw/app/406889139/free-coin-master-spin-and-coin-link-game-hack, which likely serves as a gateway to further malicious content.

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/free-coin-master-spin-and-coin-link-game-hack In PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-get-btools-on-roblox-with-no-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-do-you-get-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-free-school_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/hack-robux-roblox-2021-funciona_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_off00002fe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE0 22988 bytes
SHA-256: 0f546a53a43b36f4019def083c15ccc14fb8ed635f0ef8de37a870917d6c7391
font_01_sfnt_off0000634f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 18520 bytes
SHA-256: b58e44aecbcaca19e70979046e37dd3db737e93990968cf7f5f28eb5eef69e34

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