Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcda8f7bac548b44…

MALICIOUS

PDF

33.3 KB Created: 2021-06-20 01:21:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2624489e6af894b58b9ed4ce7e3ab8a9 SHA-1: cfe3c7ed30e3f455f92628be53868ff739ad6303 SHA-256: dcda8f7bac548b44cbb53691d74b0198f19f33195ff180a89d09f655b54d3c91
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.co/app/431946152/roblox-free-domino-crown-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-22-02-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/only-robux-hack-site_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-vip-link-for-power-simulator-roblox_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_off00002db7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB7 21296 bytes
SHA-256: dca872d0a8cad23701372e401b10d238424df772cf2327ec0230c0b416b8da34
font_01_sfnt_off00005c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3E 19364 bytes
SHA-256: 9064a3c70da71642e42590b265643047d986b1a34ba965a4e85ef4d0d90c69c8

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