Malicious PDF — malware analysis report

Static analysis result for SHA-256 b949b005079e5b9d…

MALICIOUS

PDF

47.1 KB Created: 2021-05-16 12:00:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 04490293209d1e738a1545fe723f7b0b SHA-1: 3ddaa6e0bf850c19a5c685c9cc1f1c3495b5bc84 SHA-256: b949b005079e5b9d9ec26cca1a23f76acc09807c0cd1f624723e50c253e524c5
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 'Coin Master free spins' and 'game hacks'. The ML classifier also flagged this PDF as malicious. The primary lure appears to be a fake generator or hack, designed to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-link-2021-game-hack In PDF document text
    • http://islandhopper.com.au/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/www-coin-master_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/minecraft-items_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/wurst-client_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://islandhopper.com.au/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://islandhopper.com.au/images/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://islandhopper.com.au/images/coin-master-daily-free-spins-and-coins_GM406889139.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_003_off00004a0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0B 29348 bytes
SHA-256: 0e56bc7dd9147247ffdf2926c08b1c5979694bf326854cafb197f1d1178597f5
font_01_sfnt_off00008776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8776 4084 bytes
SHA-256: 8dcca75abba4f8462f6bf460033ad8935cd3fcc1857ed935eb24039310ce352d
font_02_sfnt_off00009534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9534 18456 bytes
SHA-256: 405c435adaafa0da304b7a4986d8f56c56dc87ed278d5cff2ac0c57977d8d7e3

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