Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eaef2e5fe3dea9b…

MALICIOUS

PDF

41.0 KB Created: 2021-05-11 01:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 19a5422cab001e3b78fd26510b1fce1c SHA-1: 3967eb448e02b1ea729edb06fa21a44210d15403 SHA-256: 4eaef2e5fe3dea9b3dccdc1600931505ecad3d0df57941a6242a8fc7dbe3805e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users to potentially malicious websites, including a specific redirector for "game hacks". The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a visual download button further supports a phishing or scamming attempt. No scripts were extracted, but the overall pattern suggests a social engineering attack to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-official-website-game-hack In PDF document text
    • https://www.legclub.org/uploads/files/files/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/roblox-but_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://www.legclub.org/uploads/files/files/how-to-get-free-robux-generator_GM431946152.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_off00004560.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4560 24820 bytes
SHA-256: be55cb43e7594fa78572dc028bfa37ea987d8595ee138aee0707cda19f86c784
font_01_sfnt_off00007e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E75 17976 bytes
SHA-256: f83cd6eff6e90b0f8fdfadcf78fef37e75bbde293384ed15c7aa3271bbb87f53

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