Malicious PDF — malware analysis report

Static analysis result for SHA-256 4796952944f8f4cd…

MALICIOUS

PDF

45.2 KB Created: 2021-05-12 21:39:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 122d5075049e18bc4303e372650cc62f SHA-1: 6064c1878d07b7b17a27090b65f79b11876cfe1d SHA-256: 4796952944f8f4cdb04135bbd843e58d2594efa2cf674c6124f5107fc1be2aa1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generator / game hack" lures. The primary malicious URL identified is https://netcdn.xyz/app/406889139/coin-master-free-spins-hack-iphone-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/406889139/coin-master-free-spins-hack-iphone-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C7F 24780 bytes
SHA-256: 285572fea4baacb9930dd120db949afa647d8b7c84af7ce728f35df533fa5f30
font_01_sfnt_off00008496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8496 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E81 18220 bytes
SHA-256: 1dfaaa5fda009d523ba1163bf16545e2c66f7621c16cb7ff5e9bef64f998ba72

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