Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9828b6dc939618c…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 00:13:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 627384c2b991b66db0198375ed084df1 SHA-1: 3c6f852e6f427686e9d420824d49e9efae2fbc5a SHA-256: c9828b6dc939618c3e2c46b48510470b30151db0e39ee0226b34985b034991dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators" to lure users. The primary redirector URL is https://netcdn.xyz/app/431946152/a-lot-of-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites. The presence of a visual download button lure further supports this social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/a-lot-of-robux-game-hack In PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/play-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-free-spins--spins_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_off000049e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E9 27976 bytes
SHA-256: fe1147ca68dfe35e1fb08cc8749dedccb3543c06db4942a14f127ad500857f38
font_01_sfnt_off000089a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A9 17952 bytes
SHA-256: 59ace597cf85b15723adf2883f87d3990bd92e723e57ffb30000155e26dd48af

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