Malicious PDF — malware analysis report

Static analysis result for SHA-256 037affffcbda0a41…

MALICIOUS

PDF

49.2 KB Created: 2021-06-04 03:28:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: caeebc577f4f105fe4dafe99ce2959ae SHA-1: a2044390646b6fe46cfba5188c46714cc3c28a90 SHA-256: 037affffcbda0a41f9c211b711828265cedf8ca5e7c119f25149e0ddbbbecd9a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The document body, though partially corrupted, contains text related to 'Roblox Premium' and a URL matching the malicious redirector. This indicates a phishing or scam attempt designed to lead users to a potentially harmful site.

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 https://netcdn.online/app/431946152/how-to-get-roblox-premium-for-free-2021-game-hack In PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-hack-coin-master-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-pe_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-viking-quest-hack_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-hack-android-1-com_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-games-with-free-radio_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_off000053fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53FA 25548 bytes
SHA-256: 2b0e0a3dd93e98397318216e83e22049b8305dd8fbc232c1ec19a86dd60d495d
font_01_sfnt_off00008fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA7 3120 bytes
SHA-256: d6f8d528beb20007a05192e852346833925770f0c4ba60386aeb1ae780867d56
font_02_sfnt_off00009a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A80 19292 bytes
SHA-256: f40355f8d73764334de65774b58428be6642d496c7c5bf19d3a36d7b89996382

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