Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd6b03f1e059dd37…

MALICIOUS

PDF

35.4 KB Created: 2021-07-02 01:43:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c9b15f7e103113ec3e646698b19963a6 SHA-1: 6d8be9c98c9841bc5f2b5aefa7baa9cda6ea7187 SHA-256: cd6b03f1e059dd37b36a81ed7602e63c7ad4e848fa3a3c445b8cfed47f195e84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure is a link to 'how-to-hack-roblox-with-synapse-game-hack', which is hosted on known malicious redirector domains. This suggests a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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.co/app/431946152/how-to-hack-roblox-with-synapse-game-hack In PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-hack-and-on-roblox-on-murderer-mystery-2_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-robux-in-iphone-6_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-christmas-games-for-free_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-gainer-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-de_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/freegames911com-coinmastertipsandcheats2021freecoinsandspins_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_off0000317f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317F 22260 bytes
SHA-256: 8fa62a564b9d9c892db6b86befe52abcd2426398875d7c5922b612904fe40e08
font_01_sfnt_off0000631b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631B 19764 bytes
SHA-256: 0a47cab3938a8aa46061f1d89ece553702748609e6c1e5658f53de5a96c8745a

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