Malicious PDF — malware analysis report

Static analysis result for SHA-256 da581938aa09248c…

MALICIOUS

PDF

34.3 KB Created: 2021-06-28 20:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 139333fae0fdb2aad637ce4c0b7164a6 SHA-1: 5bb9ec088ec9359a7b65e438fd5d30d82e4aad81 SHA-256: da581938aa09248ce6bc526ae0470a1bc35fe66f7668da0b48623e21b815e4e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites that promise game hacks and free in-game currency, such as 'how-to-hack-any-account-roblox-2021'. One of these links, http://netcdn.co/app/431946152/how-to-hack-any-account-roblox-2021-windows-10-game-hack, is identified as a malicious redirector. The document's content and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful sites, likely to download further malware or engage in scams.

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.co/app/431946152/how-to-hack-any-account-roblox-2021-windows-10-game-hack In PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-sign-up-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-fe-games_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/cheats-to-get-more-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-roblox-game-data_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-for-windows_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/code-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-on-roblox-ios_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-infinite-robux-by-hacking_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-fly-hack_GM479516143.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_off00002bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB0 22500 bytes
SHA-256: 53c580bd914a7bfe3565b3e5ad828fd9e3ffbf28cdfaeed05fe1ac2a79fa0304
font_01_sfnt_off00005de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE6 20140 bytes
SHA-256: c35bd50856f7e6b8a90c68586c314d64951a80436dc8db470a3b8b38b898f63f

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