Malicious PDF — malware analysis report

Static analysis result for SHA-256 011ec5877fe15fb9…

MALICIOUS

PDF

33.9 KB Created: 2021-06-28 14:16:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 5689d8d8f406064ba2eb0da535f85867 SHA-1: 4f69d9aabeac46c7d7326f782e8451e46a8b5ba4 SHA-256: 011ec5877fe15fb9c1b23a375daebd24a997336df5a74ac8e5d5e4c51900ad8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on them by promising game hacks and currency. The primary link, http://netcdn.co/app/431946152/how-to-get-free-rocket-fuel-roblox-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive users to potentially malicious websites. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or malware distribution attempt.

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-get-free-rocket-fuel-roblox-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-how-to-get-free-faces_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-add-cheats-to-a-roblox-game_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-2021-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/app-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-minecraft-generator_GM479516143.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_off00002dc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC9 22152 bytes
SHA-256: 10c28b5fc7527b1a23faa8d2acb70e45cd89d9dff257f9a744929cf513cecf18
font_01_sfnt_off00005ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 19228 bytes
SHA-256: da10dff33e74de8178c2be7548259531bd14403a5930799d2b1f5f7a2f3a080a

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