Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f6d8ecd890932f…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 10:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 166821d23548cdef290f90d765262226 SHA-1: 453250d98e88a64014ad0e92ff8d7fffe7c171f7 SHA-256: c2f6d8ecd890932f9e822b60f9b710a38f3ec41acced4b4c2bd5f21ff751ee1c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free generators or game hacks. The primary malicious URL identified is 'https://netcdn.online/app/431946152/free-robux-codes-2021-not-used-game-hack'. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a redirection-based lure, likely intended to lead users to a phishing or malware download site.

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/free-robux-codes-2021-not-used-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-2021-today_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
stream_004_off00004f97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F97 27452 bytes
SHA-256: 2ae4e2753d6ff93cfa4d99d0e2620a031f834eb0ca02a07e83ca65d7a53541b1
font_01_sfnt_off00008c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 18880 bytes
SHA-256: 342a41804753b243bf13fa7c19db71c7debbb8fa80f4750c82899b0ccf7aa343

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