Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5ecc83cb21f572d…

MALICIOUS

PDF

45.2 KB Created: 2021-06-03 06:54:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8e24e8fa731ae65085c812fb4ce7e82d SHA-1: 4a1f292e77799c1dfea358c0d8d909dd18f7eeca SHA-256: d5ecc83cb21f572dcb193e9950c974f7489262647eaab63ac211bf92242607ad
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 malicious infrastructure, specifically designed to serve game-related cheats or hacks, which is a common pretext for malware distribution. The document body and heuristics indicate a clear intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/406889139/where-can-i-get-free-spins-for-coin-master-game-hack In PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/is-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/strucid-aimbot_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/coin-master-free-spins-that-really_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://padang.indahkonveksi.com/ckfinder/userfiles/files/free-robux-website_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
stream_004_off000054bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BF 23900 bytes
SHA-256: 14cac7266ec663d85f07a2141b43a46337c11d993c526c67233c14c0045be224
font_01_sfnt_off00008ae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE8 19412 bytes
SHA-256: 41d6401a6c93075fd80da1c31a378513eaacc2ba41b6fb325e07cb1444c296b9

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