Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a75d65fb3821c4d…

MALICIOUS

PDF

42.0 KB Created: 2021-05-14 23:18:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b39e8217444cd945bde9dc99da26584c SHA-1: 8b345bb408e4d843f9aa05553359e40708567d22 SHA-256: 7a75d65fb3821c4d6510715f3744b203a98cbb1682518ee13174789d22837bb3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites offering 'free game hacks' or currency, indicating a lure-based attack. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Fake Robux Codes' and a URL consistent with the heuristic findings, suggesting the primary goal is to redirect users to potentially harmful sites.

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/fake-robux-codes-game-hack In PDF document text
    • http://mycounty.com.ua/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-coins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/i-robux_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://mycounty.com.ua/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://mycounty.com.ua/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.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
stream_003_off0000476a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476A 25040 bytes
SHA-256: 41706077506206611adfadd68a9f1692e4054b6763d7bb3e8485943297a7a631
font_01_sfnt_off000080c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 18588 bytes
SHA-256: 9b287692f2aefd54c3dde1118ee6721d32537f3f1759e58ccd9d2ba2a1129558

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