Malicious PDF — malware analysis report

Static analysis result for SHA-256 aabb9e25d68a13fb…

MALICIOUS

PDF

31.7 KB Created: 2021-05-13 07:48:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98c10f93d67f6d393a8b404323141f71 SHA-1: 9e0d8dbc65c8c7cd22a3d2ceec8b0e382c4f3d5b SHA-256: aabb9e25d68a13fb9eb62648983de2a33a5ef8185c834ad4855dcad32183915a
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' to lure victims. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links confirms the intent to lead users to potentially harmful content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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.xyz/app/406889139/coin-master-free-spins-moonactive-game-hack In PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-coins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://rietenwinkel.nl/images/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/no-human-verification_GM431946152.pdfIn PDF document text
    • https://rietenwinkel.nl/images/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://rietenwinkel.nl/images/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004779.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4779 29472 bytes
SHA-256: d75d53c06ca665f7a725f387e8319686e8699c9a26bb832691d33e0f496c0d89

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