Malicious PDF — malware analysis report

Static analysis result for SHA-256 31ec37e9cc2fc34e…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 11:52:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cf6782a88b68ef130ef3a05682636d7e SHA-1: 03dbb3d0df06046fee36dc5d36b96c03cbf43502 SHA-256: 31ec37e9cc2fc34ebeedbe962f89979edc9c9b730b9f7933f658e7f582d394f8
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/free-robux-on-ipad-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-tickets-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-coins-no-human-verification_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/snip-hack-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-minecraft-generator_GM479516143.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/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-redeem-codes-free_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_off00002eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAF 21748 bytes
SHA-256: 6da5b420fd2868587193beb847aca2cdc5a54b841b1a9f25d22c553d847dc417
font_01_sfnt_off00005e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E97 19068 bytes
SHA-256: 67e53c85bca0a69857880cc13847ac6002be1334b1a281a29b6a7cf4a4c37e3d

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