Malicious PDF — malware analysis report

Static analysis result for SHA-256 24bd5ad9bfdf28f0…

MALICIOUS

PDF

46.9 KB Created: 2021-06-03 04:11:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: d6399f65fa8a84cd55c3cebb15f934f9 SHA-1: 8f6a447b31f093b0b13552454c1d03563838f9e6 SHA-256: 24bd5ad9bfdf28f0677ab52cee7f20dfe9c63e83749bb395cb2bd59ea9ecca57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites offering game hacks and free currency, designed to lure users into clicking them. The primary malicious link directs to a known redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/406889139/coin-master-free-spins-hack-but-no-surveys-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-cars-in-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/xray-hack_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/pokemon-go-free-movement_GM1094591345.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-spin-daily-link-net_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
stream_004_off0000514e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514E 32096 bytes
SHA-256: 21f39860aa0d8dd200d6e9e76ceb7fce4fcb684b40c4731027112ab072ab1d0d
font_01_sfnt_off000093c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C1 18708 bytes
SHA-256: e0937bcd33a3b629f0687db8d98eacd8293f1078019919402bc9ac6e2a33e1b3

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