Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d37809533515fbf…

MALICIOUS

PDF

42.9 KB Created: 2021-05-13 05:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 914c46f12b18be1dd47f7e138088921a SHA-1: 2dc4bf26a95608347e04bc62c3ccc939f2295c4f SHA-256: 5d37809533515fbf1b86f2d3f7172ab4fbce7394f0c4ebd460fcbda476bd52eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to known malicious redirector infrastructure, specifically advertising a 'game hack'. The ML classifier also flagged this PDF as malicious. The embedded URL and the heuristic firings strongly suggest a phishing attempt to redirect users to potentially harmful content.

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/tower-of-hell-roblox-hack-game-hack In PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/wurst-115-2_GM479516143.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/114-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.staiyastispadang.ac.id/repository/coin-master-hackcom-xyz_GM406889139.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_off00004c17.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C17 25020 bytes
SHA-256: 6405f932a3efb9d0ea3e913dba2fcd0dbd9967b3435f3036899057190c6fb23a
font_01_sfnt_off000084df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 18344 bytes
SHA-256: 03b0a99fcd61db89faa26c1828de523dc9cf9d0c2b9dbfe52dc8b55ccb7305a4

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