Malicious PDF — malware analysis report

Static analysis result for SHA-256 4908936e27493664…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 13:42:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4b8d620261aeaa5a890898c437fb6047 SHA-1: 6d7853fd14f7d2cb521763b2732afb8e40742128 SHA-256: 4908936e27493664a88111b96fbaf4d8cec8f2c6395a9d916889df6a1dcbef81
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-free-spin-and-coin-link-haktuts-hacking-news-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/easy-robux-hack-on-android_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/mathep_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-free-roblox-no-survey_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/fan-page-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
stream_002_off000031ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EC 22384 bytes
SHA-256: 083a82593bc4b2994345d181ca14cefb2f043d8507f2ad710f2f4b706303d292
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 18824 bytes
SHA-256: 028a7533a0cffe48b6a3e73a5ec4a7571f128d14e74948211d37bb39bd0384d4

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