Malicious PDF — malware analysis report

Static analysis result for SHA-256 f59b1ed2d7ac63bc…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 04:21:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6fe1b418667c95d02476f737a5465bfb SHA-1: 20efe8cb6a3fb1c1ba95154b20b23a3625d049d7 SHA-256: f59b1ed2d7ac63bc32273bea77913a51b8130ff490687db119f8ad43cc6b9c9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as offers for game hacks and free in-game currency. The ML classifier also flagged this document as malicious. The primary lure appears to be related to Roblox and Minecraft, directing users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/free-bandana-roblox-game-hack In PDF document text
    • http://cornerwebstudio.com/images/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-any-roblox-game-for-free_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/robux-game_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-obc-in-roblox_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/hack-roblox-electric-state_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000534d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x534D 25444 bytes
SHA-256: 9c65680a01099cd4cc1797433a957726a5365809cf502522508910e5e577b75a
font_01_sfnt_off00008bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BCC 18348 bytes
SHA-256: 13c974460f69fd7054e3aeba95004baa01d13c33083d086df3cdaa4b267d6a51

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