Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe7eb4b8714b02b7…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 08:30:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 81e6884facf18a252eb886f0c90ad163 SHA-1: ec917151b173380a4e0848fa6bbf2472919b04b0 SHA-256: fe7eb4b8714b02b7c1ea327e4bae99e47da3f0a3f34d3710fb10c1748a4040ea
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary malicious URL identified is https://netcdn.online/app/479516143/how-to-play-minecraft-for-free-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack. The document body, though partially corrupted, contains references to similar lures.

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/479516143/how-to-play-minecraft-for-free-game-hack In PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pubg-uc-voucher-code_GM1330123889.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/tiktok-free-view-kreatif-lucu_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/tiktok-free-app-download_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-roblox-gfx_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-spins-coin-master-2021-today_GM406889139.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/free-fire-tik-tok_GM835599320.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/pubg-uc-midasbuy_GM1330123889.pdfIn PDF document text
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-today-daily-links_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_off000052ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AD 28208 bytes
SHA-256: dc0c39cbd733213a6052e12003bcf61c7024a7af579cf2f3b8632f0b3828da69
font_01_sfnt_off00009070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9070 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off00009a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7F 18284 bytes
SHA-256: 30e565cae926cf2505d0f64cbbb860d09a66a84df24e80d913481d9233f56de2

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