Malicious PDF — malware analysis report

Static analysis result for SHA-256 5871ba4c2d40fcf9…

MALICIOUS

PDF

34.7 KB Created: 2021-07-07 15:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e826a5ee8c78a7868748df22955d1a2a SHA-1: 0f3d0693458d77dd2e93bd4c1be02e4d7e0e2d28 SHA-256: 5871ba4c2d40fcf9b4563b4f48b75bc9093fa7aca62ce05aff23099f1410717b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, which is designed to lure users into clicking on game hack or generator content. The primary link directs to 'http://netcdn.tw/app/406889139/how-do-i-get-free-spins-on-coin-master-game-hack', likely serving as a gateway to further malicious content or exploits. No scripts were extracted, but the presence of embedded URLs and the lure content strongly suggest a phishing or redirection attack.

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/how-do-i-get-free-spins-on-coin-master-game-hack In PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-script_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-free-candy-song_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-roblox-jailbreak-mode_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/admin-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-vip-server-for-roblox-titanic_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-robux-mobile-app_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/cbro-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/hack-de-invisibilidad-mega-roblox_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/roblox-free-robux-obby-by-elevanoz_GM431946152.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.lbhbali.or.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-blogspot_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_off0000316d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316D 22760 bytes
SHA-256: d90c50c7a7a25787b2b535a4a93f48068131349fb42ff68a267eb30b46b9fc46
font_01_sfnt_off00006440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6440 18508 bytes
SHA-256: 58f26242c5951b489404be3a4c793668ca3cfed0460ba7a035672c4835f5579d

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