Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba5db61b0f16c112…

MALICIOUS

PDF

47.0 KB Created: 2021-06-11 03:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 3664428de3e6854fb3871837f04c75e1 SHA-1: ab64ac15a95520c277cb75cf5b6ed0faa8cf85cd SHA-256: ba5db61b0f16c112164807a704f5caf89698edad1fefc5db43279fa67f6701a3
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.tw/app/431946152/rexic-roblox-hack-full-lua-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/pokemon-go-free-accounts-level-40_GM1094591345.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-injector-roblox-granny_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-without-password-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/go-to-gg-com-to-get-202120212021202120212021202100-robux-for-free_GM431946152.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
stream_004_off00004fad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAD 25228 bytes
SHA-256: 2125cf778dcc0d3f1074cf3a91c331bc34cd5e323238a2c45f2180863c8b18bc
font_01_sfnt_off00008a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A37 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000093e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93E9 18604 bytes
SHA-256: 0c3420a5e907d0f967b47ff1b36d156b1eb7626762a2d6823740dc6870b24b87

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