Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f768a71f597afd…

MALICIOUS

PDF

43.6 KB Created: 2021-05-13 21:36:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f128a36a799f79a9247b860de6b26ff3 SHA-1: f8b08a5aa249471bed31f1cc37f48ef671e62972 SHA-256: e1f768a71f597afd8a1994047314a48e19ea636d72f9293af12dc8316c4884ce
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as free game hacks or Robux generators. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-without-downloading-apps-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

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/free-robux-without-downloading-apps-game-hack In PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://buanaabadii.com/ckfinder/userfiles/files/free-mods-for-minecraft-pe_GM479516143.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_off00004a68.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A68 24688 bytes
SHA-256: a02113191ed106c108e94af99e7235544df5badb2e2b00b0d032550233c45b43
font_01_sfnt_off0000836e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 19876 bytes
SHA-256: 7dd9be13e4665f5a35086e4b23dd28e6d3ecc39135d95cb28b9ae9c86552181a

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