Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a348ec508142207…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 08:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 45cca4daf1763d832c9aeb2614b77f57 SHA-1: e6481d35bed33e15f25210f20f31a67bc696a1de SHA-256: 2a348ec508142207fe7f3988856126be4f63ca255e0b4ee085987ef4af95d434
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector domains, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL, http://netcdn.tw/app/406889139/coin-master-cheats-game-hack, is flagged as a malicious redirector. The document body also contains numerous other URLs pointing to similar scam-like content, suggesting a phishing or scam campaign. No scripts were extracted, but the presence of malicious redirectors and scam lures indicates a high likelihood of user redirection to malicious sites.

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.tw/app/406889139/coin-master-cheats-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-generator-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-script-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-get-robux-for-free-on-a-phone_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-brick-cars-cheats-code_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/lazyblocks-com-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-commercial_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-xbox-one-free_GM479516143.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_002_off000030a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A4 23172 bytes
SHA-256: 5768da40c593492b3b8c7410946e3450821b6a88af6d668ac6adae459681d988
font_01_sfnt_off000064e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 18000 bytes
SHA-256: e4f2ba289b8f862341a17bae7a615844cde9b9cf7fcf4dfa818fc0510d6a909a

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