Malicious PDF — malware analysis report

Static analysis result for SHA-256 43137afa56d5cb74…

MALICIOUS

PDF

34.2 KB Created: 2021-06-27 01:17:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 7c33080a17444c6c6b82a5841ac1760a SHA-1: 6c7c8afc62ecf5dec90f66a43472146f7226d44b SHA-256: 43137afa56d5cb7448e908f34858aa79dfdc831b20c996a6a75a45bbe5835e7c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-account-generator-with-pin-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-do-you-get-free-robux-works_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/earn-free-roblox-gift-cards-legits_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-adopt-me-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-noot-noot-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-gifts-coin-master_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
font_00_sfnt_off00002d8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8C 22288 bytes
SHA-256: 14ffcb4a23d8b465946f58f2f44e2f654dd1d9ec96d820087a92deaadf10361a
font_01_sfnt_off00005f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F40 19532 bytes
SHA-256: 6318f386ab30e4c11a21a49c9b4e0d240bf9c3fc9da6a43c1347a0af7e4984ac

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