Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebdf925a16f18a9e…

MALICIOUS

PDF

51.1 KB Created: 2021-06-07 09:34:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c5bddd3bd50a9a20956dda234522ecbb SHA-1: ecf0c2ca0a6ea9ebbf93686e74aca94026aa7851 SHA-256: ebdf925a16f18a9e1bed6be1917064eee5e69a21ea6931af3eca9574a76b4a91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/free-shirt-creator-roblox-game-hack. While no scripts were extracted, the document's structure and embedded links strongly indicate a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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 https://netcdn.tw/app/431946152/free-shirt-creator-roblox-game-hack In PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.poc-helmet.com/ckfinder/userfiles/files/roblox-sexually-abused_GM431946152.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052fe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FE 29544 bytes
SHA-256: a46e689cfb5ca484128985b71f27afa4eed0a573650a04cf9f4930da2aa04636
font_01_sfnt_off00009779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9779 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a48b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48B 18564 bytes
SHA-256: 4b6f852bf4a5efe4bd1706be1a5e46d4165ab75a567238aa83f3cc3d1c0f8a49

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