Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0c9445e8720a12b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 12:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c567d763508cc196548c1515ee2e154a SHA-1: 636ba5847c1c9c01aa66ba25ec6d50e8d989317e SHA-256: b0c9445e8720a12bc3cf0d541cd129d9b35eb351e8cdab01e2b68a2595feb5c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a generator or hack for popular games. These links redirect to known malicious infrastructure, specifically http://netcdn.tw/app/431946152/roblox-speed-hack-game-hack. The ML classifier also flagged this PDF as malicious with high confidence. The presence of embedded URLs and the nature of the lures suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-speed-hack-game-hack In PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/hack-para-ayudar-a-la-gente-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/https-www-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/topkek-hack-roblox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-hack-no-human-verification-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/codes-for-skyscraper-tycoon-roblox-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spin-link_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/where-can-i-get-free-spins-for-coin-master_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
font_00_sfnt_off00002e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3C 22632 bytes
SHA-256: 30e26ec61d6879e57fa4045e181a8a9835d0ac6cf7bf110245c8247b77b7c78c
font_01_sfnt_off00006044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 19008 bytes
SHA-256: 0d35cfadd0fca3b252b73fcf83046c0556c80fc1b3ae89449d52291489f63b0a

Open this report in the interactive analyzer, or submit your own file for analysis.