Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5007529dd4350c…

MALICIOUS

PDF

43.2 KB Created: 2021-06-04 00:25:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a04d44fcc90cbbc8e305a15ab20ca88e SHA-1: 48f14b7130dfe0bd5bf6696ae475e91f0fcefc71 SHA-256: 2f5007529dd4350c8067f138cc8fb2dd8c27ff5668732a5b11fdfe8337960395
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. These links redirect to known malicious infrastructure, specifically the URL https://netcdn.online/app/406889139/coin-master-free-game-hack. The presence of a visual download button further supports the deceptive nature of the document. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/coin-master-free-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-deals_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coinmaster-free-cards_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_004_off00005078.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5078 24260 bytes
SHA-256: 26580d4f42fd28c0e4d76da0fde7e126a3102c429e741c99c6f7089909893420
font_01_sfnt_off00008816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8816 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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