Malicious PDF — malware analysis report

Static analysis result for SHA-256 68b65a7c5a12ac3a…

MALICIOUS

PDF

35.8 KB Created: 2021-07-07 20:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e5898c3cea04a286d6103280683cab69 SHA-1: 8456d133df6f76ad6f3f5296a0c01aa5d6a8adfa SHA-256: 68b65a7c5a12ac3afbd3a57a8c06f7adde54d991075f6bc4c4153b04cc8deef7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack generator. The primary link, http://netcdn.tw/app/406889139/coin-master-gold-cards-hack-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

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-gold-cards-hack-game-hack In PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-do-you-get-a-roblox-account-and-hack-someones_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/mobosurvey-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/hack-velocidad-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/2021-robux-hack_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/hack-alle-pets-duplizieren-ninja-legends-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/codigos-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://elearning.madhpku.com/__statics/gudangsoal/files/pubg-uc-voucher-code_GM1330123889.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
stream_002_off00003577.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3577 23076 bytes
SHA-256: 02e1698ae41a871c2d4493ecafc7c13cfc9f68f0a1c3add91c81a097bfa377fa
font_01_sfnt_off0000695f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695F 18252 bytes
SHA-256: 86d208c87cd9723521760f39289724e0803f9f68e91a8c51082ac7ab23afa3dc

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