Malicious PDF — malware analysis report

Static analysis result for SHA-256 75247e421bb90dab…

MALICIOUS

PDF

45.8 KB Created: 2021-06-07 00:20:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 50aafa2e0d72a33f9fd29c452f5c5be3 SHA-1: 29e8c61b5623a046cdd829d3b107c195b6df926d SHA-256: 75247e421bb90dabc145a1bbab70806aba17e50a6cf5f342355f81de6f761f64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn likely leads to further malicious content or downloads. The document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/pastebin-hack-roblox-free-robux-game-hack In PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-minecraft-skins_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_004_off00004f75.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F75 29296 bytes
SHA-256: ce9e89d049dc07ed9179f1bd3503814eed0d823b5b6b6b61239fe50dae902964
font_01_sfnt_off00008f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F07 18864 bytes
SHA-256: ebfc8227ff694401e901559ed4823262734e5b5a10462c7d764f298f5cbc0609

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