Malicious PDF — malware analysis report

Static analysis result for SHA-256 664ea3b031997363…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 13:20:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 5d18de18ff0e2ef43167911400e1b2ab SHA-1: d5a958fc6c2904f8eb0a8e4985a27f4214b36f08 SHA-256: 664ea3b0319973633c5a80083cd2916d864a47241933d315cd8bcf767f19c5cb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure directs users to http://netcdn.tw/app/479516143/mcpe-client-game-hack, which is flagged as malicious infrastructure. The document's structure and embedded links suggest a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

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/479516143/mcpe-client-game-hack In PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/gears-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/is-roblox-being-hacked-right-now-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/pack-free-maps-roblox_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/how-to-hack-blossomu-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/how-to-get-bc-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.mtsn1siak.com/__statics/gudangsoal/files/all-players-in-roblox-passwords-password-hack_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-card-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/free-robux-xbox-one-2021_GM431946152.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/coin-master-website_GM406889139.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://mtsn1siak.com/__statics/gudangsoal/files/roblox-rewards-site_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_off000033f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F7 22264 bytes
SHA-256: 789a1682bba03e5310aaf2c3cf7f040559488b1a1bcc3b55847b4b5ec1e66ba9
font_01_sfnt_off00006559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6559 18108 bytes
SHA-256: c8b0b382a945d42a24ee610046caad250b3fa0bd75413a760b577ee3708e89f2

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