Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa871413c47044ae…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 20:28:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 4ba8d1df994c6cb323bd40ef33bd09aa SHA-1: ddf5647e48c0ce0dcebc6877b88432e720495e6d SHA-256: aa871413c47044ae482642f0de30006f3c1340e21b18a9e662b641916c707dfd
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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/406889139/play-coin-master-for-free-game-hack In PDF document text
    • http://librarystkippgribl.com/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pubg-2021-uc-glitch_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/real-robux-generator_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/www-coinmaster_GM406889139.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_off00002e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92 22612 bytes
SHA-256: 811189f804aa35d539c75c04e3cea4b3e0f6072e152e869a4716d083c4ee718c
font_01_sfnt_off00006122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6122 18408 bytes
SHA-256: f8c4a809e2c79df09a2079c4cce2304cedc8797beaad6eb7a887c6bd5ba0394d