Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7577b2a66f836c…

MALICIOUS

PDF

46.3 KB Created: 2021-06-09 04:53:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bb89cf92faabb14acb6ca4a104c68783 SHA-1: abcd1e4e3336d5b2c2a3c01eab9199966f03b756 SHA-256: da7577b2a66f836c6a37a2c8a268356baa42fd060ccfb69af570abd04d7261fa
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 0.9832

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/how-to-use-cheat-engine-on-roblox-without-shutdown-game-hack PDF link annotation
    • http://perpustakaan.urindo.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-rewards_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/john-doe-roblox-hacker_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_off00005165.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5165 27372 bytes
SHA-256: 3f97e95999c26f15b42605df22c254e9bfd7d1c2e1a6b6d83f7f4b6f6b8779bb
font_01_sfnt_off00008e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E85 19552 bytes
SHA-256: df6a9f57081c6889d0fa6189b34dbf4b787d87a5445f27301c7affe90c34640e

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