Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e77b182bc2b6c1e…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 04:52:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 11153109891c24bd8686eac11cde5ca8 SHA-1: 8e03ce99764fbfaca0aea9698c4467281e380541 SHA-256: 2e77b182bc2b6c1e17c32c54020c6185771380f726faddee95739f7bef8c7e84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a malicious redirector, disguised as a 'free generator' or 'game hack'. The document body and heuristic firings indicate a clear intent to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/earn-free-robux-game-hack In PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/10-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-apk-mod-free-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/codes-to-get-free-robux_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
stream_004_off00005116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5116 27748 bytes
SHA-256: 45de40c51ca88ccb7967d47890b956f52c2becb6d4317ec3723fd5b224a2aa9d
font_01_sfnt_off00008e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E46 18244 bytes
SHA-256: 032754c85be32afc54ce42ff57082bfda3d842c531a4409870c690b3212eb60e

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