Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fac9db64f8224a6…

MALICIOUS

PDF

44.9 KB Created: 2021-06-10 14:58:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b5b3f75dbe8f66f85db9eb379864200a SHA-1: c33ffb7741b2b6bb14c6cc3a3868653a576affff SHA-256: 2fac9db64f8224a62017496a3e1eaa305300ffd51556100e60513c66452f1997
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 0.9865

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.tw/app/431946152/glitch-to-get-free-t-shirt-roblox-game-hack PDF link annotation
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/cone-master_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/pokemon-go-free-leafeon_GM1094591345.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mts-sukaramaiatas.sch.id/__statics/gudangsoal/files/free-robux-website_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
stream_004_off000052ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52CE 25896 bytes
SHA-256: 4bf2496f546bd3fa80941bb1489e983100f0f360601c4210c0d9ff2c41c8cf22
font_01_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 18340 bytes
SHA-256: 4ad6e8255a2b818524e78a7a37430486903fad09926482efd5962b4d3a93a0cd

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