Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58dcc2824bd167f…

MALICIOUS

PDF

47.0 KB Created: 2021-06-04 02:40:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cb4eede2f576089b2776085f4da5efb8 SHA-1: 60a2ff720cea5e5f21ea769d3f8348aac95e61a8 SHA-256: d58dcc2824bd167f7bc1ad3b8927fee4569820b4bc42be4cf6e5f2c967474b0e
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 0.9769

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/how-to-get-free-robux-pastebin-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-mojang-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-for-surveys_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/games-to-get-free-robux_GM431946152.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_off00004fde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FDE 25392 bytes
SHA-256: 9f332d05934520e8e116d3be0e86980306c8640ecf42a927af81260d75146592
font_01_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 2912 bytes
SHA-256: fa76cc2dab30b56d5305de71ce949b6adffd6580af2f26905a33966a3200adbb
font_02_sfnt_off00009342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9342 18784 bytes
SHA-256: 4f7be874ac86b6a03b7aace6fa23f5ccfd17cc838d0a4aa434eb4746da9ed40e

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