Malicious PDF — malware analysis report

Static analysis result for SHA-256 de851b6a7daacf9b…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 13:38:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bb35de2821a35591582b5d1b6e4d459e SHA-1: 1a49ef2e5151ea9981bd75fb61615ce4fb10c0a2 SHA-256: de851b6a7daacf9b34ba90eb046c8e19f352c71a646a8741d9877674c5f76a08
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 0.9864

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.tw/app/431946152/how-to-hack-into-a-account-in-roblox-game-hack PDF link annotation
    • http://pustaka.faterna.unand.ac.id/repository/how-to-change-you-name-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-free-robux-on-laptop-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-free-3d-online-gmaes_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hackear-roblox-para-tener-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-coloring-pictures-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-free-spins-daily_GM406889139.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_off00005185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5185 26768 bytes
SHA-256: b82f061f43159cfcfced897b178d1ffddf4ff757cc7d31c4dd63cd0b43aa1b9b
font_01_sfnt_off00008e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9E 18588 bytes
SHA-256: a2ffbcb6fb118866bfd36f741ace8874d8eceee619367e7405f85dc345a60ba5

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