Malicious PDF — malware analysis report

Static analysis result for SHA-256 453b9baea1c2dd81…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 13:14:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2dc9df0eb114402b9a49bdf4fb0ff437 SHA-1: 112ca2c8400f843ec94be69883788cc0d992f9fa SHA-256: 453b9baea1c2dd81d1e902e17bb8f23e35dcbb868659cba787630e97a66ea4aa
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.tw/app/835599320/free-fans-on-tiktok-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-roblox-free-robux-and-tix-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/flood-escape-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-reedeem-codes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/cheats-roblox-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-tuxedo_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-boys-cheating-on-girl_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/stylish-animation-pack-roblox-free_GM431946152.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_off00003071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3071 21800 bytes
SHA-256: bd3364aded9c7042d3379b9d0d07dfacc536a2f47ed1180a962ff72e33337ce8
font_01_sfnt_off00006052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6052 17972 bytes
SHA-256: ea292e92860e991b086e3354e90b18d6ff6caa74ca39ec57381af5bbf1d92ce5

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