Malicious PDF — malware analysis report

Static analysis result for SHA-256 272e9b7a2f3bde33…

MALICIOUS

PDF

44.1 KB Created: 2021-06-04 00:06:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e21cb632f9a231995537de9771d4c80e SHA-1: 6a131cdc9a8838404271dd6729c75d497f07172a SHA-256: 272e9b7a2f3bde33983c9b8bb086644d941e0435658c005acf10be726f3b6721
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to known malicious redirectors, disguised as "free generator" or "game hack" lures. The ML classifier also flagged this PDF as malicious. The primary malicious link identified is https://netcdn.online/app/406889139/free-spins-coin-master-app-game-hack, which likely serves as a gateway to further malicious content or exploits.

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/free-spins-coin-master-app-game-hack In PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/pokemon-go-free-and-home_GM1094591345.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-spins-and-coins-today-gift-reward_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_off00005326.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5326 24784 bytes
SHA-256: f32e6fa3ba7388202b3209836d66e75e2249573c7a74e7f1cf977a95b7d61d46
font_01_sfnt_off00008b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 17884 bytes
SHA-256: ed1ea3c4e7635b9f65a5e0b6798c92341d7c1feababf17669f4466b6be8364ea

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