Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e227df1b78e7c47…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 06:32:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1dcb417d675abc819020e0817fe88a78 SHA-1: c21bc6ea9ac8a48f57b4ea678f3cd2c61a8dd83f SHA-256: 3e227df1b78e7c4706c20ec55b1f53b2650c9c05f68830815e0557de0087b565
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to game hacks and free generators, presenting a fake CAPTCHA to trick the user into interacting with a malicious link. The link redirects to infrastructure known for malicious activity, suggesting the primary goal is to lead the user to a site that likely hosts malware or further phishing content. No scripts were extracted, but the PDF structure and heuristics strongly indicate a social engineering attack.

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.tw/app/431946152/beautiful-roblox-shirt-template-download-free-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-app-link_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-present-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/roblox-jailbreak-cheat-noclip_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/hack-midoriya-full-cowl-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/comment-hacker-roblox-sur-pc_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-com-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_off0000535e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x535E 23916 bytes
SHA-256: bb1c20513534e8fc030af7ecb34fac502fd6ac7a88a2eb63c8948662ca6ac192
font_01_sfnt_off000089f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F3 19648 bytes
SHA-256: 99912ce0fc60b3b4e1b39380b59d485f234bfe3fee80805fcbf900fbfe99d9af

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