Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7b0b82dda64ad5a…

MALICIOUS

PDF

44.1 KB Created: 2021-05-15 03:35:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4886392622095726749b72db82299db4 SHA-1: 15ca3b528e3b62e3e7421d90f0bcd3137a0b4521 SHA-256: c7b0b82dda64ad5a1ccbd734d0c7439442ca30c550fd4bdd807eae0138974b6d
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 0.9969

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/431946152/how-to-get-free-robux-codes-2021-game-hack PDF link annotation
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/como-generar-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsasyrofuddin.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-apk_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_003_off00004bbb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BBB 26124 bytes
SHA-256: 99fb70b25d6fed87ef449576588aec26db6d22bc04ce87ce5ff4f98d837a686a
font_01_sfnt_off00008810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8810 18856 bytes
SHA-256: 204886f9a3a3d456a8ba924f34e84de86e5dda13901e78a872ce278a746af401

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