Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10fc0807cfb2739…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 23:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: bebc4f8e5eeec44ec99fad4e572f7431 SHA-1: 5abd606678ddbbe8dfbbdbed78cb0b7091cafe2d SHA-256: e10fc0807cfb27394575118390ac7d6174f757558809e2fe2f8cb44f97d12f8d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users with promises of in-game currency or cheats, leading them to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-groups-2021-game-hack In PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.elearning-masalbidayah.net/__statics/gudangsoal/files/hack-coin-master-xyz_GM406889139.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_off00004d6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D6B 24648 bytes
SHA-256: a20741eb1d2708989cb1ec4fe504baa4c4f4216b8495a169a23731335f04eb06
font_01_sfnt_off0000863c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 18592 bytes
SHA-256: 40c688a228a34b1cb0523430700763228a7eb04120cc8b5f4f4e5fd2bdb4007a

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