Malicious PDF — malware analysis report

Static analysis result for SHA-256 1189d7b8e1948585…

MALICIOUS

PDF

33.8 KB Created: 2021-07-21 22:31:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 10d0300ce7909b8dd0580e028da4a003 SHA-1: b133b1e603bf8d471d9d74d54cfccc898dd8eac0 SHA-256: 1189d7b8e19485857fedd4dbd70beb262ea31e58d8cb7b14eeffa1a2581765e1
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 0.9946

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-no-verification-no-survey-game-hack PDF link annotation
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-hack-me_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_off00002b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4A 23160 bytes
SHA-256: fdba30b71e381431777f4df3a0121ffeeab1dd4b41743667a73c68d6a746b91a
font_01_sfnt_off00005f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F92 19080 bytes
SHA-256: 3aa5536e13f08746819f67c2713727982ed9c08100d434dc46d7ecdd471cfd15

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