Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ed00583adeb6e0…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 13:38:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55c59d9658a1e555dfea88aab13b76ac SHA-1: 236ab522a3375b86c7b33dcfe0772c43da2b414e SHA-256: 79ed00583adeb6e0e35e0babb851b1bec9e4dcde5309fb2d33c7d85cece80107
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a prominent link within its body text, all pointing to websites offering game hacks and free items. This indicates a social engineering lure designed to redirect users to potentially malicious sites. The ML classifier strongly supports the malicious nature of this PDF, and the heuristics confirm its use as a redirector for game-related scams.

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.tw/app/431946152/free-roblox-adopt-me-accounts-game-hack PDF link annotation
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/is-hacking-roblox-a-crome_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-free-avatar-drawing_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-robux-hack-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-free-clothes-on-roblox-2021-no-bc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/50-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-giver-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-roblox-for-free-on-ipad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-roblox-apocalypse-rising-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/cheat-roblox-wallhack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-into-an-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-ranked-up-in-roblox-group-hack_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_off00002fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE9 22112 bytes
SHA-256: e74ddae7df2330084f9393538fa17db6bf2cc145f20ca08a03fa0d0123b3fc4d
font_01_sfnt_off0000612f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612F 19440 bytes
SHA-256: 88194e20aa1d794cbfbc6ec60bdf20d6817b6f04f409d3f051b45d150e534ec5

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