Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f37931ae5952c6…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 12:58:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bd1d20d0f1c8568c43d2e832f5638dfd SHA-1: a01214289d9ec1f8c6f896267ae350c8708ac55e SHA-256: 97f37931ae5952c6675c98ceea46524ea04f3769dff789b110773a15eaf024fe
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/431946152/get-free-robux-today-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-blue-hair_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/stella-download-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-pick-a-side-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/fly-hack-for-roblox-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-a-roblox-gamw_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-free-robux_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
font_00_sfnt_off00002f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F01 22556 bytes
SHA-256: c10f75dec0491189a4e8ac62994004825e189606a129c1a3ec99bce938fddb35
font_01_sfnt_off00006104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6104 19172 bytes
SHA-256: 3fdd240faf6e1407f7e3e305b0db49c456ea6d47955c0aeac931bfd374d9ce8c

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