Malicious PDF — malware analysis report

Static analysis result for SHA-256 23b668d064bd3ca0…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 04:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 66b7373294d3ce57a978d26d769496d7 SHA-1: a9eec1aaf36cca381fec61b33ecb52951b11347c SHA-256: 23b668d064bd3ca031eca90d273ac4195bbe6608a0476383d74c9d9540deaa3f
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 0.9971

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/406889139/coin-master-game-android-free-download-game-hack PDF link annotation
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://elearning.man3kabupatenbanjar.sch.id/__statics/gudangsoal/files/roblox-hack-download_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_003_off00004b57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B57 24236 bytes
SHA-256: 6a76a7519a7ff26ef29ecbe8d34b153b5d34d0a435d5cf9226daee5702f4dd8a
font_01_sfnt_off000082cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82CF 18548 bytes
SHA-256: 410bff1bf062602f617a153b189e58c0fc30012b031a4f5a53fb6347e35a049e

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