Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec528818604a84d…

MALICIOUS

PDF

33.4 KB Created: 2021-06-19 05:28:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 06f3c66a2bfa79eabc0d49c409d12ccb SHA-1: df62d049b7f61f95238f70346dff25c40dbd8e09 SHA-256: 5ec528818604a84d15ee495d421232fb12414300a429bba3d6bdab79e6b2c987
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and generators. The primary lure, 'Cheat Codes Roblox Jailbreak', points to a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into visiting malicious 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/cheat-codes-roblox-jailbreak-game-hack In PDF document text
    • http://lib.vipklh.ru/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/gift-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-zephplays_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/im-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/youtubecom-ultraw-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-website_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-printable-roblox-images_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_off00002d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9C 21472 bytes
SHA-256: 80ff99689c776a7257f72069480c621904904645accdb31b44df735a793a9b35
font_01_sfnt_off00005c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C4E 19384 bytes
SHA-256: 531394b34366881acbc1f6834adf7add10ec288929de9d5885152fa5bcfe151f

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