Malicious PDF — malware analysis report

Static analysis result for SHA-256 764dc8c8ff1907d8…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 22:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bb7d0c57c5da1139e915adde58b60168 SHA-1: 664383da05401fa07a915abad24385982e229459 SHA-256: 764dc8c8ff1907d8169dc2ff008819facd50fe3ede31e8dcbd0c241c1d995df6
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/479516143/free-minecraft-texture-packs-java-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/where-to-find-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-games-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-a_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-stuff-for-your-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/5-easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-hack-edit-leaderstats_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/i-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021-no-suvey-n0-human_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/xray-mod-minecraft-114_GM479516143.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_off00002e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7C 22340 bytes
SHA-256: 3392589885c9fc8563e291f06ab779c9da5ac6179ab52440295cd980e2092623
font_01_sfnt_off00006028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 18812 bytes
SHA-256: cd2577f9d023cd5f4ebcbda4b98e3c4613b00ff39f70da431fb912141d199680

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