Malicious PDF — malware analysis report

Static analysis result for SHA-256 391ee2fe8f069e0f…

MALICIOUS

PDF

47.2 KB Created: 2021-05-11 22:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1b1b5f52bcea88a7b4e9f8710aae1934 SHA-1: 6ae88e975e221192a2ef20cf9fb352593f351f14 SHA-256: 391ee2fe8f069e0f43155540cc6961d3ffcbd3053372025f7e7d3e0e48bbd068
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 0.8948

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/avatar-the-last-airbender-roblox-game-hack PDF link annotation
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-svg-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://elearning.mtsalyusra.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.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
stream_003_off00004a6d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6D 28224 bytes
SHA-256: a5af3a5f883e35eb153f79c82f91bb18f728c01543ba19629ef7c07a7a2511d6
font_01_sfnt_off00008b2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B2E 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off000094df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94DF 18692 bytes
SHA-256: f66b47eed37cd3b132d5bde49a39db92434aeefb3a2333eebc70f5590a2134f1

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