Malicious PDF — malware analysis report

Static analysis result for SHA-256 393370bf705e74eb…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 10:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 431df922635198b7df7914037488ee0f SHA-1: 08ddeac2dd70619b6b91d1c737ebf785264ddf55 SHA-256: 393370bf705e74eb0414ccb0f465f6ac0d8d5aedcfd1ccd2ba5828d45f51bc6c
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/431946152/best-roblox-skins-for-free-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/easy-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/blogger-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-by-roblox-events_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/martian-lettuce-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/beyond-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-32-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/promodes-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-coins-and-spins_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_off00002e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E71 22088 bytes
SHA-256: 1ca58d9b79cb77e97eeeb9d57e35795abfb82b1156225f1eabfe48289173efe7
font_01_sfnt_off00005f7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7E 18860 bytes
SHA-256: 07e1c9621539a64ea79818579dc7fef1ffeff8eeb86de533891320c15304c1f3

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