Malicious PDF — malware analysis report

Static analysis result for SHA-256 c220d4afc7b7a29b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 05:44:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f986faa8b763003317164892bd6964b SHA-1: 9aac0f1bbc034d46455449e22d8b107e4ee99324 SHA-256: c220d4afc7b7a29be508ab07318b035770f530010f562bb61ac559f1999aba69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The document body and embedded URLs reinforce this lure, pointing to sites offering game-related cheats and currency. While no scripts were extracted, the PDF's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/479516143/free-minecraft-skins-java-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-wiyh-email_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/script-cheat-for-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-galacxy-cheats_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-raps-for-outo-rap-batils-for-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/body-building-roblox-weightlifting-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-free-no-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/pubg-uc-mongolia_GM1330123889.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/wwwfree-robux-todaycom_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-do-i-hack-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/hack-coin-master-free-spins_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_off000030ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EF 22548 bytes
SHA-256: 172586c6f0a7a94884dcdb77d7d2d0c722225683cbd3c6a79fda96e9e0bf2e6d
font_01_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 18304 bytes
SHA-256: 401eb49ff2a7bbc2c0a7320b67dbf183b2d718a040190e5e2c5f0615a3ea9473

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