Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e6b5342ed8d939…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 18:51:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: c38805af5789b21aabedb9e911b15d82 SHA-1: 1da72226622643088307eb6b0ee20659061285c9 SHA-256: e0e6b5342ed8d939f57f43a7389240b91ad028e1bf45c53440345d01d4aed077
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The document body and heuristics confirm the intent is to trick users into visiting these URLs, which likely serve as a gateway to further malicious content or exploits. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack.

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/free-online-spins-coin-master-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-undertale-game-script-hack-stats-giver_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-codes-no-generator_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-mad-city-hack-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-good-pet-ranch-accounts-free_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/como-se-hacker-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-robux-apk-october-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-hacking-guest_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-solar-tycoon-hack_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_002_off000031b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B0 22532 bytes
SHA-256: a555ed22567dae69248dfa053cc5ae98fa7a7bad13444a2128f111347ca6fb61
font_01_sfnt_off000063de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63DE 18248 bytes
SHA-256: 69f566190966a66c1fe8ab6bbc8550b86d8e85ebd5e604a82219f2cafac13777

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