Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c244cd817e5cf9b…

MALICIOUS

PDF

33.6 KB Created: 2021-06-30 05:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 9ab830fcfcf139e85a68ea4d667afe98 SHA-1: 5e155b09298e5d965eb30208f81916574e480c32 SHA-256: 7c244cd817e5cf9b3a398426af42d4c525c09f43a6da565de2e15bbdd3700716
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, directing users to malicious redirector infrastructure. The ML classifier strongly indicated maliciousness, and multiple heuristics confirm the presence of malicious redirector links. No scripts were extracted, but the document's structure and embedded URLs suggest a phishing or scam attempt.

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.co/app/431946152/skin-hack-roblox-game-hack In PDF document text
    • http://suaedy-library.net/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-furk-blocburg-cheat_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-free-without-sign-in-also-free-robux-no-downloading_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-do-i-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-roblox-games-mobile_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/pastebincom-free-20b-robux_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/tiktok-free-to-watch_GM835599320.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-hack-a-roblox-account-easy_GM431946152.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_off00002edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDF 21768 bytes
SHA-256: c3f3923285d58b3f5639575128cba5f9e5079396283ac310872b66e9f90d8350
font_01_sfnt_off00005edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDB 18776 bytes
SHA-256: dec2d1e7e09bc4029098bf17d2b6c3a68c513d66a81088c292c1e25c2c4d7729

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