Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae37bb64632e2c8…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 16:34:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1276c18dae21517eeb9158a7f5fef8c2 SHA-1: 0201add021f9a13ba2b06e627586a7049dde3946 SHA-256: fae37bb64632e2c887fff528eca94af856390d855bf3a12ffbc9a7440397905d
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 0.9796

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/roblox-robux-hack-2021-working-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-irobuxcom_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-windows-10-edition-hacks_GM479516143.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_004_off000050cb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CB 25256 bytes
SHA-256: c5fce5b119c122bee50472ef7f115ac3d55493aa7e6f3322ce283c569c1c9978
font_01_sfnt_off00008b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B4C 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off00009606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9606 19328 bytes
SHA-256: 5493c984622b8b5b99606eaf39966eeccfd28103582539bd7b22cefa7130e4b2

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