Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4d940e916d746c8…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 16:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 80cdd84249b86ceebaa952f8524cfe58 SHA-1: 6499b644eeb7cd0791972e397fa27ef512d9fc9e SHA-256: b4d940e916d746c8cbed223deda808dfae8d7762ae1afe2e9f635d4718b8138c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free spins, directing users to the URL http://netcdn.tw/app/406889139/coin-master-hacks-free-spins-game-hack. This URL is flagged as a known malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into visiting this malicious link, likely as part of a phishing or scam campaign.

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/coin-master-hacks-free-spins-game-hack In PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-free-stuff-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/cool-roblox-avatar-for-free_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/free-to-play-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-free-stuff-on-roblox-catalog-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/roblox-models-hack-your-account_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/will-you-get-hacked-buy-buying-robux-online_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/hacks-on-mad-paint-ball-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-get-free-godly-knifes-on-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-install-sandbags777s-eye-ball-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/roblox-mania-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-hack-roblox-accounts-tutorial-scripting_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/get-robux-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/how-to-create-t-shirts-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://perpus-baitulhikmah.esy.es/akasia/repository/robux-sites_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_off00003095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3095 22560 bytes
SHA-256: 551332821d81385911fcc04f97ef0fb51405dfd36ba5b55eef6ce3167107a78d
font_01_sfnt_off000062fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 18344 bytes
SHA-256: 947667c85d24b0d3a8de245f111eeade861a88a333665e7462fd4878b305e25b

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