Malicious PDF — malware analysis report

Static analysis result for SHA-256 790ee8bae8cf4ac1…

MALICIOUS

PDF

47.3 KB Created: 2021-06-09 16:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a2555734a50fe76363c430ff471d279b SHA-1: 4f3761483c7d0a8142e314e494e43e05491e6ab8 SHA-256: 790ee8bae8cf4ac1c41f6883764d5dee5ec2d4d5afda72977dafe4827601ffbc
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/get-free-robux-2021-no-human-verification-game-hack PDF link annotation
    • http://www.library.umbjm.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hack-prison-life-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-anarchy-server-no-hacks_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-final-stand-cheat_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-hacker-kolorowanki-do-druku_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-boombox-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/static-moonactive-net_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coinmaster-twitter_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_off00004ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CE3 32016 bytes
SHA-256: 30a12078caae9c96f37fea7b68f1382d8b12733ef7c03159beb093d6e09094c5
font_01_sfnt_off0000937a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x937A 19260 bytes
SHA-256: 232f9c7631a539a48600e93d243637164896a430a59ba171f2f73f10d921e77b

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