Malicious PDF — malware analysis report

Static analysis result for SHA-256 8557e35aae9cfc19…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 05:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4654deff7293a8474c8ab9d8e088295b SHA-1: d7172de69c932538087c67c37137a87859baa9cc SHA-256: 8557e35aae9cfc19da9a4924f1092deabbfab2f5ef17083d9f4acbcd7c79fce6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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 https://netcdn.online/app/431946152/robloxheroxyz-free-robux-game-hack PDF link annotation
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/original-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coinmasterfree_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/robux-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tilamuta.go.id/repository/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000507f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x507F 26048 bytes
SHA-256: d43d27bad167e8e8c5f7766944b86f7a0cc85ac6e0c1b4718f1461ae817c296b
font_01_sfnt_off00008c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C99 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9684 18516 bytes
SHA-256: 7f1ed049da75acc608f0fe66657ee4628d82e762443bbdd60fa03b2ea4156da9

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