Malicious PDF — malware analysis report

Static analysis result for SHA-256 5289d8b4611ecc50…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 10:11:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eb495f2bdac844e8d3b615a75452aa13 SHA-1: dc2052cb1546029e1fb64e64d1e8e3394e3ef2bc SHA-256: 5289d8b4611ecc50f3ca02c7e5248a605f9cbad27b948722b40a926ac03cdbf5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux hacks' and links to a URL hosted on 'netcdn.tw'. This URL is identified as a redirector for game hacks, indicating a social engineering tactic to entice users to click. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/hacks-to-get-free-robux-game-hack PDF link annotation
    • https://www.harfa.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/can-i-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.harfa.hr/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • https://www.harfa.hr/files/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://www.harfa.hr/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://www.harfa.hr/files/how-to-hack-coin-master_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
font_00_sfnt_off00002d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D63 22356 bytes
SHA-256: 83031a7d190165ed0043cea68a70e1c886a6dc04fdadcdf55b3bbcf02d75e28c
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 18992 bytes
SHA-256: a46b776bb67c7b468de6bb210db8cc3c07a9aad6d9a2155761eaac94cf23c7ac