Malicious PDF — malware analysis report

Static analysis result for SHA-256 6436b7da08b50531…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 02:25:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: cd8061059d260d360fdda0453e2420b9 SHA-1: 7ac9991b2f4ca769a31c1ee5b843649b1447d4db SHA-256: 6436b7da08b50531bd85f964587640c0414fb64f75321189493772a28d24d3f6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free spins for games like Coin Master and Robux. The primary lure appears to be a "free generator / game hack" for Coin Master, directing users to the URL http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-app-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-free-spins-link-2021-app-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/claim-free-robux-obby_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/5-level-7-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/hacked-games-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-hack-ios-12_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-bots-allowed_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-badges-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/app-store-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/pubg-uc-2021_GM1330123889.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_off00002e77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E77 22624 bytes
SHA-256: d8a3e944c2f0787fcc42fa58f81b181cfac695ef7df5f65a1a54f84cb65a6dff
font_01_sfnt_off000060ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 18748 bytes
SHA-256: d782a6a7edaad5fc3b48e51c3186ad1aa17f937ebeccb5fc7dc7f3982caa8f61