Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef4034fe98b7dff…

MALICIOUS

PDF

42.1 KB Created: 2021-05-11 13:56:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 7cccb2254ae344d285339391bb614afa SHA-1: b74c717545f8f5c83070b9d1eaab32b2ea1cf0cc SHA-256: aef4034fe98b7dffa59999cf1f60821275e47edfb7e06d9d4cff1c3df20cd3b8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "free Robux" or "game hacks". The primary malicious URL identified is https://netcdn.xyz/app/431946152/rbx-land-free-robux-game-hack. The document's content and embedded links strongly suggest a phishing or scam attempt, likely to harvest credentials or lead users to further malware. No scripts were extracted from this sample, but the embedded links are sufficient to classify this as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/rbx-land-free-robux-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-free-spin-whatsapp-group-link_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_off00004a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A96 24144 bytes
SHA-256: 7ef9c7aee2a0d22467dd32159d83a8f33a2a48d1732c1ecf80c40ce31c46436f
font_01_sfnt_off000081a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81A0 18416 bytes
SHA-256: ed1846d837a30ccb27e25bdb955d82aabb746909bdcfb120b1e9cc4e6290fa01

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