Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9763723ea22dec…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 00:03:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6e1a2b65ac6b10c1cbf2c620f82ecd08 SHA-1: 41f704870397b83dcd3934cc55628f4551c39026 SHA-256: bf9763723ea22dec7d5d4b296e1281727821b70315a570074e3b33a7072642c9
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/pig-master-free-spins-and-coins-game-hack PDF link annotation
    • https://www.harfa.hr/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/download-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/roblox-rules_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-daily-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/mc-hacks_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-hack-coin-master-apkmody_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_off00003208.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3208 22976 bytes
SHA-256: 2202b01dafaee754a0e0e85e284452b6cda9f56a52b619acf1004bbad8520cc9
font_01_sfnt_off000065b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 18504 bytes
SHA-256: 6056a570be9e4d8d624ca2870b69fe0d687aadf42f4c0d7bdeffead1297d87c0