Malicious PDF — malware analysis report

Static analysis result for SHA-256 48509f8b9c328670…

MALICIOUS

PDF

38.3 KB Created: 2021-05-20 18:43:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e74f7955efff9f8f162f88b97f30878d SHA-1: 9431aed4491660620e7b8c662b36902dfb679419 SHA-256: 48509f8b9c328670a3154bdffeaa9764013f8e006d254f117efd6488bf0c3a00
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 0.7268

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 https://netcdn.xyz/app/479516143/how-to-hack-minecraft-pe-game-hack PDF link annotation
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://lpk-citranusantara.com/ckfinder/userfiles/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D0 24640 bytes
SHA-256: 2d35b165cedda61d0cdc53be398f905465245a97e1dd10d907c0052a28e49b7a
font_01_sfnt_off00006a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A71 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7480 18196 bytes
SHA-256: d34ad1dbd9dd4a0600043f837e3a6c6fdafb13b781254d1b565cb7d4b46c75dd

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