Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ddc4bf3e853f197…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 22:29:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ac0e8c1aa530a4d5380d1e760731ab0e SHA-1: 91e5627fae86615f4723c00940e6f5494b0e07d7 SHA-256: 4ddc4bf3e853f1971e82a2996228e0a5b99aadbed34b68f1a76e7c2f161612e5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a clear lure for a 'Coin Master Hack' and directs users to the URL http://netcdn.tw/app/406889139/coin-master-hack-spins-app-game-hack. This URL is flagged as a redirector for game hacks, indicating a social engineering tactic to entice users to download potentially malicious content or visit a phishing site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-hack-spins-app-game-hack PDF link annotation
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/roblox-superhero-city-hack_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/robux-download_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/roblox-free-robux-generator-bc-only_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/noclip-hack-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/moonactive-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_off000032b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B0 22724 bytes
SHA-256: 5515f831793058b7d374b978526bd6f43a98fb2aa512eff4260040e72e118b5e
font_01_sfnt_off0000658d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658D 18180 bytes
SHA-256: 1e953b72540ec4677b5f3a09436cf02581c7252e246dbe5ac414cafa51ba2d5d

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