Malicious PDF — malware analysis report

Static analysis result for SHA-256 b970786e4b36f260…

MALICIOUS

PDF

42.3 KB Created: 2021-05-10 14:00:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5160d53f0396f8a06e4044ac36a69a89 SHA-1: 8d8e0637a24d3f8bb39fd77ef7b81db3a2d88c9f SHA-256: b970786e4b36f260a725687abe4686036c6d27cf247edfe140811164d8523629
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'robux' and 'game hacks'. The document body, though partially obfuscated, contains the primary malicious URL and other related URLs. This indicates a phishing or scam attempt designed to redirect users to potentially malicious sites for financial gain or further compromise.

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/431946152/robux-2021-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3EThe%20Robux%20Generator%20Will%20Give%20You%20Free%20Robux,%20No%20Password%20Required.%20100%25%20Working.%20Please%20do%20not%20abusing%20to%20keep%20this%20online%20hack%20tool%20alive.%20ROBUX%20will%20be%20added%20automatically%20after%20finishing.%3Cp%3E%3Cp%3EBest%20Way%20to%20Get%20Free%20Robux.%20Free%20Robux%20are%20very%20easy%20to%20get%20with%20this%20powerful%20generator.%20The%20only%20thing%20you%20have%20to%20do%20is%20to%20choose%20your%20robux%20quantity%20for%20your%20username,%20and%20wait%20for%20the%20generator%20to%20create%20the%20resources%20for%20you.%20How%20is%20This%20Possible.%20We%20do%20not%20generate%20new%20robux%20on%20the%20phone,%20instead%20we%20do%20this%20on%20the%20Roblox%20server%20side,%20so%20...%3Cp%3E%3Cp%3Efree%20admin%20commands%20roblox%20exploit%3Cp%3E%3Cp%3Efree%20roblox%20game%20card%20code%20generator%3Cp%3E%3Cp%3Efree%20robux%20trade:%20wahoogaming.co%20free%20robux:%20roblox%20free%20robux%20no%20survey%20or%20download:%20how%20to%20get%20free%20robux%20no%20joke%202017:%20free%20robux%20100%20real:%20100%20robux%20free:%20free%20robux%20roblox%202015:%20roblox%20hacks%20for%20free%20robux:%20free%20robux%20on%20roblox%202016:%20get%20free%20robux%202014:%20how%20to%20get%20free%20robux%20without%20human%20verification%202017:%20how%20to%20get%20free%20robux%20easy%202019%20...%3Cp%3E%3Cp%3E...No%20Human%20Verification%20&%20Free%20vbucks%20generator%20:%20Learn%20How%20to%20get%20Free%20v%20bucks%20no%20human%20verification,%20Free%20V-Bucks%20no%20survey%20or%20verification.%3Cp%3E%3Cp%3EHOW%20TO%20GET%20FREE%20ROBUX%20*EASIEST%20WAY*%20In 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_off00004ad3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD3 25444 bytes
SHA-256: e8055688442f0f9a66f1c7ac8000df21bdd6034d2aad514ae276153cafcc40c0
font_01_sfnt_off0000860a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860A 17200 bytes
SHA-256: 05a4e3c5dc73e637a24ffba6de66de46e9d2d374c2f72f8f62b922ee6e59421b

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