Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c804ddebbb3bf28…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 00:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b42fd5c0166d62e1c37642b04dd8ceac SHA-1: 6a33c230cf9342d3de144c9f72d7c9c94ff22f3d SHA-256: 4c804ddebbb3bf28b96b9dbc707e7c3148c3937beac65c2adae426f7028b221c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document displays a fake CAPTCHA lure to entice users to click on a link. This link, identified as a malicious redirector, points to 'https://netcdn.online/app/406889139/pasos-para-hackear-coins-master-game-hack'. The document's content and the presence of a malicious redirector strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/406889139/pasos-para-hackear-coins-master-game-hack In PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/earn-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fateta.unand.ac.id/repository/free-executor-roblox_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_off00005277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5277 25712 bytes
SHA-256: 85ac7c43bfe6fcad1ce6fc3434ce6f9b744e85ec359afa79975469286e203377
font_01_sfnt_off00008d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D2F 17868 bytes
SHA-256: 59162798968571b58eab4ea002b9aaa75bdfc5001cc9a37297d5f6ee37b3b3bc

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