Malicious PDF — malware analysis report

Static analysis result for SHA-256 f68c2eacba5db956…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 05:33:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a458055c7373bde0191389089b7aaedc SHA-1: a411247d6bcd7c0c18561ccf8fb6cb748e57c90a SHA-256: f68c2eacba5db9562d89d97822ddcda79b1d78e94c4f2c4a67a940835e983e02
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a prominent link that redirects to malicious infrastructure, masquerading as a 'free generator / game hack'. This lure is designed to trick users into clicking the link, likely leading to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/406889139/free-spins-coin-master-march-2021-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-mod-apk-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/install-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005356.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5356 25168 bytes
SHA-256: 29ca2484264e8401884941c45a3b5e1ef5e036f1d084bfb58a000dba84645ce7
font_01_sfnt_off00008d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off000098b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98B7 18452 bytes
SHA-256: f9f67c77da0d65153792dedd850da678f3a8682f9327ac55251990d25044da35

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