Malicious PDF — malware analysis report

Static analysis result for SHA-256 87f85d3904ae1171…

MALICIOUS

PDF

36.2 KB Created: 2021-06-26 02:49:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b0361dc0380d75217f18e6bf3ac9344d SHA-1: 03f1c64ab67f00721ba20049289cb2a75c222070 SHA-256: 87f85d3904ae1171c11c158e7ade19fa330eb597f65fa4529d04b1e5743ff47a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' lure. The document body and extracted URLs reinforce this, pointing to sites offering game-related cheats and free currency. While no scripts were extracted, the primary attack pattern involves social engineering via a deceptive link, likely leading to malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.co/app/406889139/coin-master-free-gifts-game-hack PDF link annotation
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/roblox-how-to-use-cheat-engine-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/all-of-the-free-hair-on-roblox-not-model_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/best-roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-places-in-roblox-studio-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-any-item-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-get-free-animations_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-sell-items-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-change-your-roblox-username-for-free_GM431946152.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_off000037f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37F4 23076 bytes
SHA-256: afa2105c74c2f727071fe9b299ad049a9344766de9706f9f726de7ad1e3f386c
font_01_sfnt_off00006be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE7 17996 bytes
SHA-256: 0554876b2ab95b57b2a8903cbabfbfa90e4f9f04422ab63317bc25d957b52972

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