Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5fc287d13e09e7…

MALICIOUS

PDF

49.4 KB Created: 2021-06-13 16:18:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 113b86186b162d8ce94d8fdc0d725582 SHA-1: af6a827d131b122994fe4491d294fd98a0087ab5 SHA-256: fb5fc287d13e09e7f1fef760b37ae4be32f600938dcfe54a721d943949207985
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as 'game hacks' and 'generators' to lure users into clicking them. One prominent link, http://netcdn.co/app/431946152/how-to-walk-through-walls-roblox-2021-hack-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 http://netcdn.co/app/431946152/how-to-walk-through-walls-roblox-2021-hack-game-hack In PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-app-com_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-roblox-hackingcom_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/get-robux-free-today_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-free-hacks-2021_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-gg-free-quick_GM431946152.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://e-pustaka.stkipadzkia.ac.id/repository/robux-hack-real-one_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C3 26588 bytes
SHA-256: 57f10ab0c9a8a75b82ca77436715817c268a52e303c734e6acbcc67d0cdfbde7
font_01_sfnt_off000090ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90EA 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00009a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8B 19540 bytes
SHA-256: 855be3a69edc5c5b616922ef582e3151bd5b27dafe2962916a7d4872a3360936

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