Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7c91b2acb999c1…

MALICIOUS

PDF

44.4 KB Created: 2021-05-12 05:06:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8707904ac4f4ba0d2110cc6b7bfd5f28 SHA-1: a2eae809adf05d8b37e99d7ac140a64ec9dd8912 SHA-256: 5b7c91b2acb999c19707b05ddf699d6202f61d7ad8ac4a6683a4314915e61815
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to trick users into visiting potentially harmful sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/oprewards-free-robux-game-hack In PDF document text
    • http://repository.poliven.ac.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.poliven.ac.id/repository/free-robux-for-free_GM431946152.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
font_00_sfnt_off00004883.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4883 27408 bytes
SHA-256: 220f3d990414fe53790dcb9ccb67f719acd8f6be0d3b041efbb004428978b29b
font_01_sfnt_off000089be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89BE 18756 bytes
SHA-256: ea6a04d6c65882c9dd78ee7ca96c70e45062fdc6b69d68e2fcdc099d3abb6428

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