Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3f37ddc74b59f8…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 21:22:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ed45ee4d61357f1640373e42dd19cfe3 SHA-1: 2db52b6ccb0d69cb33ca63bc46450f4ef3f4e193 SHA-256: 6d3f37ddc74b59f87065ea3fcf2542432bbf2d3a0f3b41ad5e7d96bb9801b5c7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts other malicious PDFs. The document's content and embedded URLs strongly suggest a phishing or scam campaign designed to lead users to further malicious content.

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/how-to-execute-code-with-cheat-engine-on-roblox-game-hack In PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-stuff-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-robar-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-roblox-accounts-june-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/kachifpro_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C6 22320 bytes
SHA-256: fc94a2ca2a40ec426ce9ef5cb00161fcd6a60bfb4644e21d412d9ecbd56d4448
font_01_sfnt_off00006249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 19552 bytes
SHA-256: 4a5d7242bea879680230d82dafe9468d318ef14c6aca48dc14ab4afe1cce4d9e

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