Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e6dc10ba567c574…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 08:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 177675de31340651b3964fea6a7db924 SHA-1: b711a5c027f55e1a641031f598fb9c8b0979f56f SHA-256: 4e6dc10ba567c57474130be383cac6ddb17d03cf5b1ea0f9b8c9c07731f1f673
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious websites. The primary URL identified is http://netcdn.tw/app/431946152/how-to-hack-people-in-roblox-game-hack.

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/431946152/how-to-hack-people-in-roblox-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/is-there-a-possible-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-robux-game-you-achley-get-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/cheat-roblox-csgo-november-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-roblox-accounts-2021-may_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-hack-any-roblox-account-with-their-roblosecurity_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-robux-sign-up_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/hacking-roblox-jalibreak_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/hack-for-roblox-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-codes-wiki_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_off00002e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E99 22680 bytes
SHA-256: b9b7b72b13eaa7da86b08c6e896055a30bd945591c4986316f9ee7624a9079df
font_01_sfnt_off00006118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6118 19148 bytes
SHA-256: 210a0ca19f3049b49adbbe174b6d1900b8bba92406d0cafcc0c0c398ed60933b

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