Malicious PDF — malware analysis report

Static analysis result for SHA-256 466109015f3635a1…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 04:51:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a9e78367fc2a1bb334b5a381509a0932 SHA-1: da05530116446b8fb9c59fed122cb5352b2f8c86 SHA-256: 466109015f3635a13a9b89288bdfe6f565664a88f75af60fde5420570462f309
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/coin-master-links-for-today-game-hack PDF link annotation
    • https://www.knjiznica-oroslavje.hr/files/roblox-free-no-download-online_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-models-virus-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-coins-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/ways-hacks-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/boombox-roblox-free-catalog_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/tiktok-free-download-apk_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-hack-on-roblox-phone_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_off00002ec8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC8 22352 bytes
SHA-256: 00a7961d14e48e7255d44dc242c0906590390ef49fc1f2d45c1649d59d53f395
font_01_sfnt_off000060ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BA 18524 bytes
SHA-256: 9e2b17a2888e17d335209aec35c43d796348b949677bc7770edd394e7e2bb40c