Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea5df733ab42871d…

MALICIOUS

PDF

35.6 KB Created: 2021-06-24 22:25:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: df7b76c13b4eb2804b12821d64b20d6f SHA-1: bc45231e5d626a31708a29d0438dbe3557a6fb12 SHA-256: ea5df733ab42871de24618d61cd0bbf4b76c9da5fe6dcf81e57981d51d94ac86
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on 'free generator / game hack' content. One of these links, http://netcdn.co/app/431946152/free-robux-fo-rreal-game-hack, is identified as pointing to known malicious redirector infrastructure. The document body and embedded links suggest a social engineering attempt to trick users into visiting potentially harmful websites.

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.co/app/431946152/free-robux-fo-rreal-game-hack In PDF document text
    • http://muslib.unmus.ac.id//repository/master-free-spin_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/without-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/proxo-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master--hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-only-1-step_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_off000033d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D2 22872 bytes
SHA-256: e36fbc4500e8b8635e617fa58997af7c85335e7893487d898186ef74a2e51055
font_01_sfnt_off0000671a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671A 18788 bytes
SHA-256: 4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08