Malicious PDF — malware analysis report

Static analysis result for SHA-256 382a61ccc51278ad…

MALICIOUS

PDF

33.6 KB Created: 2021-07-04 11:52:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: db74550c5aac3ef2444bfe82bb4b32d7 SHA-1: f669ab31250394f3fd3aab5a161a1ac91ba7c6cf SHA-256: 382a61ccc51278ad003c137a518deb91d118622a9743093c4859cd89dc9e3ad2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The primary redirect URL identified is http://netcdn.tw/app/406889139/coin-master-free-game-hack. While no scripts were extracted, the document's structure and embedded links strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/406889139/coin-master-free-game-hack In PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/hacking-a-roblox-fans_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/free-400-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/how-to-get-robux-cheat-way_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/como-conseguir-el-egg-hunt-de-hacker-roblox-el-egglicht_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/roblox-online-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/optifine-mcpe_GM479516143.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/roblox-1x1x1x1-hack_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/i-sleep-roblox-hack-oh-shi_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/kazok-roblox-hack_GM431946152.pdfIn PDF document text
    • https://adoz.cz/ckfinder/userfiles/files/rbl-gg-free-robux_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_off00003134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3134 21988 bytes
SHA-256: c6c18b6063cadcb6227e9cc6eaebd215c36170f1997a4611794877ce2298c5dc
font_01_sfnt_off00006193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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