Malicious PDF — malware analysis report

Static analysis result for SHA-256 081a7e2b7ebcbb2e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 02:53:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b0fa3c849b48c2794fcc611c5bdc3e6 SHA-1: aa142f978a5e3187af3f0f294693fc26bfcc0d61 SHA-256: 081a7e2b7ebcbb2eed83f4a291e54f1c9f0071b9d46e95d3f33b9ab91fc5c6f2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple links and text lures related to 'free Robux' and game hacks, indicating a phishing or scam attempt. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-without-human-verification-and-email-game-hack, which likely serves as a redirector to a malicious site or a download for malware. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-without-human-verification-and-email-game-hack PDF link annotation
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-hack-robux-2021-in-1-min_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/a-modded-day-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-items-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/get-free-robux-no-download-no-waiting_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • http://www.sarrafoods.com/uploaded_files/userfiles/files/free-minecraft-account-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_off00002c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C7F 22796 bytes
SHA-256: 6376accce4ae2610708aad7205a678f7a4fc0f174096466ba9e8c8e92e787b34
font_01_sfnt_off00005f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F30 19948 bytes
SHA-256: d1ccf3a43fc04cf3bd783b6e04f94b6230d0d68f7f54d36a57b1bf5d57e2f1cd

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