Malicious PDF — malware analysis report

Static analysis result for SHA-256 482a67d815331a28…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 20:40:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4d96770a5bb0545e2a1c85bdc7e4e95b SHA-1: 181a98a0fc49a3c80d4a8b892bed58fd4f8dd874 SHA-256: 482a67d815331a2881dbe409488c1f927902d94cb88d2b0d692dab5d5083cc5e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. These links redirect to malicious infrastructure, specifically the URL https://netcdn.xyz/app/431946152/how-to-get-free-robux-without-verifying-2021-game-hack. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to lead the user to a potentially harmful site. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or redirection attack.

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/how-to-get-free-robux-without-verifying-2021-game-hack In PDF document text
    • http://adravietnam.org/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/microsoft-rewards-roblox_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.adravietnam.org/images/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://adravietnam.org/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://adravietnam.org/images/robux-premium_GM431946152.pdfIn PDF document text
    • http://www.adravietnam.org/images/roblox-account-hacker-tool_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_off000049ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49AB 25156 bytes
SHA-256: 724916a7f9c44af381f3afaa2fb0d33fb1b71db4fc6e21c0a021a7c44a46745b
font_01_sfnt_off00008406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8406 19772 bytes
SHA-256: 854662d4ed02eaea1b0a0020fc7ac25fa5b331288bf96b43491be4028b138ed1

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