Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f1777580fc271e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 18:29:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c877156a5e6c306f8589ce7a6f033740 SHA-1: 05908319c8b497f662f07de9642651815c8cf18f SHA-256: d1f1777580fc271ef55cc6b0988c83d671439983b3e30ceb0a43e5c1e95a3cd2
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/minecraft-free-no-download-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-no-virus_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/proxo-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-long-is-the-minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-group-funds-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-cheat-money-into-roblox-high-school_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/getrobux-come_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tool-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/https-www-roblox-com-games-2021202156-free-bux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-girl-roblox-accounts_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_off000031c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C5 22048 bytes
SHA-256: ad67624af5a4113f40fcca15aca65c1728e63b83de46b08f8d260d5909695951
font_01_sfnt_off0000620f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620F 18576 bytes
SHA-256: 821daecccb4d9802b425771331493e81bb578503857a5f1b541bc873f81a5cab

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