Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c3318d34d3f92c…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 21:41:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f36d61d2d362fc96a62126cb1a7465fc SHA-1: 015ad4355a8862483cdf54a2f5be5c436a9a7b05 SHA-256: d9c3318d34d3f92ccc7d7a34d523366a7adf96c63d77e3b5e566e04ba033203f
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/406889139/free-daily-spins-from-coin-master-game-hack PDF link annotation
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-23-march-2021_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/how-to-cheat-on-roblox-murder_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/boku-no-roblox-hack-money_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/neruc-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-any-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/roblox-dinosaur-simulator-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/cheat-roblox-aimbot-v3rmillion_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1sintang.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.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_002_off00003532.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3532 23004 bytes
SHA-256: 2934fc6a67e8a80156a8a4265aae57c296b219ea10f72430655818d2dd0a179f
font_01_sfnt_off000068ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 18856 bytes
SHA-256: d310d8b42a9db28f952d6c808dbfd2c0798e16e205ce104a4cdcfe428c53c924

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