Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5d02e30959307de…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 17:52:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b6ad941e4c661e276c5f081d29880c31 SHA-1: 2dd125ac9b3151e66c5b91bef9cf61f0cb351e3d SHA-256: f5d02e30959307de9e3ad0edf31298aa834d1139f621a4e5d1adf2347abbeeb4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of free game currency and hacks. The primary link, http://netcdn.tw/app/431946152/free-robux-games-that-actually-work-2021-game-hack, is designed to lead users to potentially harmful content. The ML classifier also flagged this PDF as malicious with high confidence.

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-games-that-actually-work-2021-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-tampermonkey-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hand-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-for-android-apk-downloads_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/check-cashed-v3-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/lego-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-walking-animation-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-any-server-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-shirt-templates-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-ios-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-money_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/hack-roblox-fixed-pc-infinity-heroes-x100_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-ssscripts_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-codes-that-work_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-mod-free-download_GM406889139.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_off00002bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC9 21896 bytes
SHA-256: b178e58c90840967890ed80fd9067ebf3a35b2c57d6635d1230198403ca735ad
font_01_sfnt_off00005c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C76 20272 bytes
SHA-256: 3dcbb05b4dce0a2bab4a10db55923dcb732eb0f4a2e9bcb9735c66d658b8cabb

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