Malicious PDF — malware analysis report

Static analysis result for SHA-256 57776bd3e0954b03…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 18:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bd2d0adf337fdf1ecd43d98fe642f8fe SHA-1: 0ec5e0183db5e138b2ed0ea6bc24c745460d94e2 SHA-256: 57776bd3e0954b03f5c4637f7ee5bf03afe1895336f7a701406c1b6d03952ee7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which links to malicious redirector infrastructure. The embedded URLs and the primary redirector URL suggest a phishing or scam attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/master-free-spin-game-hack In PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/roblox-re_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_003_off00004ae2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE2 27312 bytes
SHA-256: ab61293bcbce91a37d1087ee3c4663dc0e12c0044a7b6b1d6699524e6fd7ea43
font_01_sfnt_off00008882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8882 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9234 17744 bytes
SHA-256: f2331a3c380b29fa6924a7d98cc121391afa4585b22bf6708bddf5542bc1013c

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