Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7abfb75257171f3…

MALICIOUS

PDF

46.2 KB Created: 2021-06-03 08:33:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: be0f234a63414b77a6c1c971e605a709 SHA-1: 2960d18a3e0335b20d5174a85ce279759830e06e SHA-256: b7abfb75257171f38bef86c7daec57cc33042127260bd1a2089210bf8bb012a8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free spins' and 'game hacks' for popular games. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of malicious redirector links and the lure content strongly suggest an attempt to lead the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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/406889139/25-free-spins-coin-master-game-hack In PDF document text
    • http://library.stieyapan.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-bedrock-free-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.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_off00004d7d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7D 25824 bytes
SHA-256: a856e5f7a2a6d1d32903bdea5c93b71f8d0a4ce0dea73ce7254520788ae7b2f0
font_01_sfnt_off0000873b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873B 3204 bytes
SHA-256: b7fe42cb1da39e96c756399b3532633df029c1fbb3443b9e17d98df25c90dc65
font_02_sfnt_off0000923f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923F 18144 bytes
SHA-256: e61324631e03e98c071e12442239b73d0a12fcb8243797d210d051c8d69b565d

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