Malicious PDF — malware analysis report

Static analysis result for SHA-256 42de1d371151ef7c…

MALICIOUS

PDF

42.3 KB Created: 2021-05-15 14:36:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a052cd0963327356f1a8126d638f96e6 SHA-1: c8fd680b069e4fff4f5de4eca681ae433490f90b SHA-256: 42de1d371151ef7c417c56d3e20b20653902b7c19e47ddbf54b772f7002e8ebd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering free game currency or hacks, such as 'how-to-get-free-robux-codes-game-hack'. These links are identified as malicious redirectors, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a lure to trick users into visiting potentially harmful sites, likely for credential harvesting or malware distribution.

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/431946152/how-to-get-free-robux-codes-game-hack In PDF document text
    • https://academy.cr/images/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://academy.cr/images/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/google-moon-active_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/getrobux-info_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://academy.cr/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://academy.cr/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4772 26580 bytes
SHA-256: f13c6adddb56ddd37ef244cee4002dc5e65059b13a805dd1d9923eb4883284d3
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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