Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3eba131126504a…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 05:51:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c91589c3904b6cfbd70b81eaa33e985a SHA-1: 09e789bc9b2bf727a9399d11b7b23e338e51836a SHA-256: 2a3eba131126504a1a4d1bae7c0857a2699cc0138e08cd3bf7b00a022d6be2bd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, disguised as 'game hacks' or 'free currency generators'. The primary lure is the promise of free Robux, a virtual currency for the game Roblox. The document body and heuristics indicate a redirection workflow designed to trick users into visiting potentially harmful sites.

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/how-to-get-free-robux-codes-2021-game-hack In PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-without-verification-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-hack-without-human-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/do-you-gey-free-robux-with-builders-club_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/robux-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/robux-infini-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-brick-cars-cheats-code_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/hilton-hotels-lua-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-vampire-hunters-2-noclip-hack-how-to-do-it_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-ninja-head-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id//repository/best-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-dompu.go.id/repository/rblx-gg-free-robux_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_off000030dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DD 23484 bytes
SHA-256: 36f45ca0e1b0b36d002d1a2bad8fee85389128cf3fc1c13542e46f3b194e70ff
font_01_sfnt_off0000654a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654A 19560 bytes
SHA-256: 23fd6b1887025421e6e39521b650ee02de163ea1ebb303fc14ef8bd616b7f3d5

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