Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d70b05b11ea97f5…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 09:37:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: af91c6c854a266302d97725950141cda SHA-1: e05e9067c512fbad687d99ec76f648b2f583868d SHA-256: 9d70b05b11ea97f59e321124a29821693ee0c4e94a8001067a0d31b703f7ced1
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/406889139/free-spin-coin-master-link-2021-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-world-free-to-use_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-admin-commands-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cheat-teleportation-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-phantom-forces-roblox-2021-november_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-hack-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-restaurant-tycoon-free_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-for-kids-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-bucks-hack_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
stream_002_off000033ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33AE 23124 bytes
SHA-256: 3e91c5a3f49dbb352675e933cb3be27a867dc9ab8dbf69a35b20d27f2c05e700
font_01_sfnt_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 18748 bytes
SHA-256: 21e227a5b4a4e86201c5ffd53a68098e06ad4a81ecbeade678e9824eb4386a01

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