Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81a1e7309c14306…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 16:57:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 67c78ffaa33e366b705ed17aa4c9e175 SHA-1: 7fcbefe332396920c22dc42bb28765cf5e2e8eff SHA-256: c81a1e7309c1430671f2804c0895d2bf339438c5be5b68032928219727f44bd0
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/431946152/free-robux-no-human-verification-2021-game-hack PDF link annotation
    • http://digilib.pustaka.unand.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-hack-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/get-money-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-jailbreak-free-vip-server-link-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/ninja-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-loadstring-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-tiktok-comments_GM835599320.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-piano-keyboard-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/roblox-counter-blox-roblox-offensive-free-skins_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/walking-through-hack-roblox-v8_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-automatice-robux_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-robux-generator-without-download-and-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-hack-roblox-im-poison-life_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/1m-robux-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/how-to-get-gamepasses-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/to-find-people-ingame-in-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.pustaka.unand.ac.id/repository/free-roblox-promo-codes-2021-not-expired_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3156 23240 bytes
SHA-256: 5204b6db0930ae23d7368fef14294055e332bfdc3c9222ef3d38c735b23ab88b
font_01_sfnt_off000065e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 19736 bytes
SHA-256: 354295dcb16db07fec6852cf507e3dd09a8f39b1f712ecea2001cf8559992bf9

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