Malicious PDF — malware analysis report

Static analysis result for SHA-256 e282216d1e07d086…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 00:25:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 770704fc1cc7ff73c0d428a9030b4df3 SHA-1: 2e41d6f2d9ac5a2b3daf92cab63a27e71786fb02 SHA-256: e282216d1e07d08603fd7b33ae1820a1e7e1907bb653573ea2a5d640f39e3916
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to trick users into clicking a link. The link redirects to a website promising free Robux or game hacks, which is a common social engineering tactic. The document contains embedded URLs that point to known malicious redirector infrastructure, likely serving as a delivery mechanism for further malicious content.

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.online/app/431946152/robuxlove-net-free-robux-game-hack In PDF document text
    • http://library.umla.ac.id//repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-view-jelly-fruit_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pubg-uc-shopee_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-apk-hack_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_off0000503a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x503A 25012 bytes
SHA-256: 563d35a6feec8f5e4889ba8e75b69b690ba7159786f8ea141a0ca1d0358987d5
font_01_sfnt_off000089b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B7 18308 bytes
SHA-256: b28048e238ef22262afd6ecc0e077496c49329ec7afac569f73d1b46f1ce60f0

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