Malicious PDF — malware analysis report

Static analysis result for SHA-256 c40f1e24e2ecec4a…

MALICIOUS

PDF

41.4 KB Created: 2021-05-11 02:13:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0ac369c17a19506089c445c079ce063b SHA-1: 484c427c463c0d00495af71f9cc6ae42d2a4473e SHA-256: c40f1e24e2ecec4a1094774f83c449ef1bec7ab6540bbb85e98c014931048448
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or scam attempt. The presence of a visual download button further supports the lure. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely for malware distribution or credential harvesting.

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/479516143/free-minecraft-pe-server-game-hack In PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/minecraft-apk-download-free-11-055_GM479516143.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/coin-master-hack-pc-download_GM406889139.pdfIn PDF document text
    • http://ofthalmiatrosthess.gr/images/try-minecraft-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_003_off000047bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BB 24668 bytes
SHA-256: c104b60ba220834f70004d21a9dd573b054b6def26aa300dfa8e8a1507f9cb96
font_01_sfnt_off000080b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80B7 17836 bytes
SHA-256: 40ba9e4e6a96b9fbdb66fe1c3cdc29181d81f4b56a4eeac74a5dcf6bc0460396

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