Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a00aa2dddafc75…

MALICIOUS

PDF

34.0 KB Created: 2021-06-27 12:48:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9dee5d8548366d36aff5328e54304f1b SHA-1: f8efeac4ab13c8686a02140a7e46fb13b7f364de SHA-256: 75a00aa2dddafc758e09cdbed8ced6f719e4e4847e573dabecbb04f6560834c8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a domain known for hosting malicious content, specifically targeting users with lures for free game items like 'Robux' or 'Coin Master' spins. The heuristic firings confirm the presence of malicious redirector links and a general lure for game hacks. No scripts were extracted, but the document body and heuristics strongly indicate a phishing attempt to drive users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/free-robux-codes-reddit-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/free-ten-dollarr-roblox-gift-card-codess_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-weight-simulator-3-cheat-code-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-com-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/best-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/for-free-robux-on-roblox-com-free4mobile24-com_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/microsoft-rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-2-get-free-robux-2021_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_off00002f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F13 21952 bytes
SHA-256: 51fe6520a57b11e738c0bc8ccdc32439c8cee2d36e3b4ac5129505a833db04f3
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 19112 bytes
SHA-256: 7138e2639ff15bb9223ad7e074921f973bcdb7a645ac60eba12f6c090f5b4ede