Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e89d0feac287051…

MALICIOUS

PDF

47.6 KB Created: 2021-06-03 07:26:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f1049f5edae0c0bfef0cf10bcbddf5cb SHA-1: c55a821a47c0960c5e3e40155df40526aa91963f SHA-256: 4e89d0feac28705124f7da13fb9dea07e0e5870a58cf1be69d676a7cb88a4759
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, a common lure for phishing or malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' specifically flags this behavior. While no scripts were extracted, the presence of these lures and the ML classifier's high confidence suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/ww-robux-game-hack PDF link annotation
    • http://librarysenior.com//repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-coin-and-spin-app_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_off00004ed6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED6 26136 bytes
SHA-256: f5c8f72d1d89da16574ea1199086bae6c72b3e7634ce22043fd1120321131b00
font_01_sfnt_off00008a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A4A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000975b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x975B 18212 bytes
SHA-256: bcccb1e001e2f5e7ef72a5433eb4dc11bdbc574927e5f5e748e53d7576d93cee

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