Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff771b99d95b3cf…

MALICIOUS

PDF

44.6 KB Created: 2021-05-19 05:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 484ce9fb5a1d3b461a6ff0c9f04882ff SHA-1: 6e0616d6b971f77a299f0bfc33230744e71f80de SHA-256: fff771b99d95b3cfeac42bc52a308b210651ea62d8600fd24ad63c782ca71288
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on offers for free game currency or hacks. One of these links, 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-email-game-hack', is identified as a malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware or credential harvesting.

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 https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-email-game-hack In PDF document text
    • https://www.sauvonsleclimat.org/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-33-hack-version-download_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-robux-download_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/robux-match_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.sauvonsleclimat.org/images/coin-master-hack-apk-july-2021_GM406889139.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_003_off00004bb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BB5 26132 bytes
SHA-256: 30b34dd66fc93ac2320aa9e71af7629d6af5703bda7657bf8590c99d9e438847
font_01_sfnt_off00008905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8905 19328 bytes
SHA-256: 2bb545c14ce80967bc964a539ce1fba7d75b9199f0e299556cda79647f99e488

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