Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f06ec4b2ef53960…

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 01:13:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 38e3d6e899e9a43a0c92899824e8f1d1 SHA-1: 35ec86b9d33100a89dd84b389d85c87cea786a02 SHA-256: 7f06ec4b2ef53960920c67fb6a2f82a889f911b9f043b39ea85f3f37da4585af
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures for popular mobile games. The primary redirector URL is https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-link-today-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/coin-master-free-spins-and-coins-link-today-game-hack In PDF document text
    • http://elibrary.perludem.org/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-mod_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_003_off0000486d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486D 26964 bytes
SHA-256: 9078d639c8b8485f69574f9d5d3fbeb13490cf32d2e45a992190ef96ea74c057
font_01_sfnt_off0000857e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x857E 19384 bytes
SHA-256: dfb4c93a2b3492d2e1752a30890b5fffc2a7f02a07e98b5608eb7e906e15a4dd

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