Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb437b2b9639e856…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 20:34:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: df84d1bfc6e175f48e8d1f2c7d4949e1 SHA-1: a89359c4f17b92d50cc3d64055d86223c5ba4688 SHA-256: cb437b2b9639e856df71a0ce8dac954517c6a8905290f8ff1e5006c67c3f3204
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/479516143/minecraft-ios-mods-game-hack PDF link annotation
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-robux-discord-group_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-hack-into-peoples-accounts-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-get-wall-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/games-to-get-me-free-roblox-now_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-hack-items-into-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-studio-free-download-android_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/roblox-download_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn2bogor.web.id/__statics/gudangsoal/files/free-robux-websites-2021_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_off00003204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3204 22036 bytes
SHA-256: f514bde338637268d353e25a9cce0aefe61b476e1ade50a37b53e9fb4946ded1
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 18172 bytes
SHA-256: 56b22b05c6c29367c4c938ecbda02e8ba185ee7da968fb32465555374010e690

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