Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5a120a223dc44d…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 19:23:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: b89aa9944430738c9b784f5a8a17e822 SHA-1: 3d088d1eef335cdbb7f29c438e7587022d234c64 SHA-256: 2c5a120a223dc44dca21a7127a03fbc96cabd19eb18da6790160352ab03cb9ac
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/hack-a-game-game-hack PDF link annotation
    • http://perpustakaan.iahntp.ac.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/high-school-life-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/roblox-hack-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/install-roblox-free-for-pc_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/no-human-verification-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/best-hacking-software-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/robux-free-may-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/counter-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://perpustakaan.iahntp.ac.id/repository/phlego-films-roblox-free-bsdge_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iahntp.ac.id/repository/free-spins-coin-master_GM406889139.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_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 22160 bytes
SHA-256: e83d4e7ea0ef040ef94f6f2e61352d416b6b89530e9273a9a50f970acb54954e
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 18332 bytes
SHA-256: ba9a5ca92ba82b06d62fb7d932d8411f4ef5b8c8ca9324ffa17e0e8336b0cdba

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