Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f73d13e80ea584…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 16:06:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e21729e1a384559d97f0867b0f8b9e5b SHA-1: 5ed66e3fd8a77b974bc6fa86dbe3be8a3eb9b259 SHA-256: 47f73d13e80ea584f3a240a6fd636a8d5bbd57d7fc14b9c465e6f20686269407
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as a 'game hack' download. The presence of a visual download button further supports the lure. The document body, though heavily obfuscated, contains references to game hacks and download URLs, reinforcing the deceptive nature of the file.

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/download-hack-coin-master-apk-game-hack In PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-game-free-download_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/roblox-devil_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/rbx-com_GM431946152.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn 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_off00004873.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4873 25660 bytes
SHA-256: 9a78724e9a710d1420ca9e6eb9aa71ff96789d11cd59f09efc02cf981f839339
font_01_sfnt_off0000827b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827B 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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