Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7bdaf1bd550e3a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-03 12:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 387379db36e8840c7664ebf935b93033 SHA-1: a9879b070516ab1517056c370d64b5ebb439fd18 SHA-256: 5b7bdaf1bd550e3ab27aebabbc80a7b302db29047512abcc338a494907eadf0d
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 0.9980

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/how-can-i-get-free-robux-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-downlad-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/como-ser-hacker-en-roblox-en-todos-los-juegos_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-accounts-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-roblox-games-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-its-free-commercial_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-promocodes-roblox-october-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/code-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-lumber-tycoon-money-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-items-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-no-builders-club_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_off00002db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB2 22184 bytes
SHA-256: 25946ec058bed1e719eed5fffe4e7d0ecd63ca3d488bbe34aacb21ab3820368f
font_01_sfnt_off00005ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 18984 bytes
SHA-256: 88d69eb3e5aacbb9415b7e9d5cab519469ee3fdfdf18acc61836835876a3bab2

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