Malicious PDF — malware analysis report

Static analysis result for SHA-256 8171b6db5426ff0b…

MALICIOUS

PDF

45.9 KB Created: 2021-06-04 01:55:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: acc7d793a0e65606f0a974a8f80a1040 SHA-1: 150ccf93747688ec16adf8cdb44b73b0956b8a8f SHA-256: 8171b6db5426ff0bfc826fb296e167ef488366026c72e5b533a8218b80a6ebeb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on a malicious URL. The primary link, https://netcdn.online/app/406889139/coin-master-hack-tool-exe-game-hack, is presented as a way to obtain a 'Coin Master Hack Tool'. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely leveraging a social engineering tactic to trick users into downloading a potentially harmful file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/coin-master-hack-tool-exe-game-hack PDF link annotation
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/cone-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-fun-hack-online_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-coin-master-card-free_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_off00005028.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5028 24240 bytes
SHA-256: 728ce02c362b5bac17cd955be220711060d27db74121a63320ea1e92f3263391
font_01_sfnt_off000087a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A6 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00009159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9159 18000 bytes
SHA-256: 4986d21a4b5a0dd9c27fb69bc80aac457c531d809421d21d3eeb28a335a679e5

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