Malicious PDF — malware analysis report

Static analysis result for SHA-256 db57d2212c38dadf…

MALICIOUS

PDF

35.0 KB Created: 2021-06-20 00:11:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 6191d14f9940efa1b70ecc8967c512f2 SHA-1: 25677364a1cd2c86acfd1335746c083de5819e9d SHA-256: db57d2212c38dadf2777b4b6db2c2a341f7a11f7d063c9fe51f97785a3218ebd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a site offering 'game hacks' and 'free generators', a common lure for malicious downloads. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at tricking users into downloading further malware.

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/hack-magic-simulator-roblox-money-game-hack In PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-admin-hack-55-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-videos_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-escape-obby-for-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-themepark-tycoon-hacked_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3141 21932 bytes
SHA-256: fe30a01d9cf8eb67e2fb319191b21e3456e571a853f96a13d4ff5d3cfe77a9c3
font_01_sfnt_off00006209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6209 19656 bytes
SHA-256: 08f4d0d323bc9b6b31c02d4cb6869650b26b2aa70cad87d5f39113e58ba2ff62

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