Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1af641f6de71b4…

MALICIOUS

PDF

41.9 KB Created: 2021-05-16 05:45:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 87719125674be65804d38e5ca9011a99 SHA-1: 367de6579dc5529b9d89ca3fb0d8d161feffc96d SHA-256: 1d1af641f6de71b405f87ff5860a692fc71b8f6cfc3d132b1494208e90eeb40c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacks and free in-game currency to entice users. It contains multiple embedded URLs that lead to known malicious redirector infrastructure, specifically pointing to 'netcdn.xyz'. The document body and heuristics indicate a clear intent to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-hack-apk-latest-version-2021-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/grab-points-login_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-online-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-java-edition-for-free_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
stream_003_off00004938.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4938 24624 bytes
SHA-256: df1781c7b611d7ccf173b712d8b2529d775816403d67df95e04dedb44ddcae5b
font_01_sfnt_off00008082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8082 18428 bytes
SHA-256: 3ea7a61419cbe52eb029f29c9b150dae48cf78ebe9ef7deec7bc9e8a272032f3

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