Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd9f42098426896…

MALICIOUS

PDF

36.6 KB Created: 2021-07-03 19:09:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 64a39c48f96eb3c3e2091639568a2e15 SHA-1: 8561d28f792f42033940c57791570dc65aad0c1b SHA-256: 7fd9f4209842689675f71ac3e84960d2dabdb3381f90602ce39febcf6e1c6e0f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'free generator / game hack' which redirects to a known malicious URL. The document body and embedded links suggest a social engineering attempt to trick users into downloading further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure indicate a high likelihood of a downloader or redirector pattern.

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-free-coins-and-spins-daily-game-hack In PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/is-hacking-roblox-a-crome_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-robux-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/tthye-beeat-app-fo9r-free-robux_GM431946152.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://mtsnslemankota-elearning.net/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad-mini-4_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_off00003614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3614 23468 bytes
SHA-256: 38d32dd75d0e8c3b469ec189f0db825fd62199843dddce54fdd6083f91adaf72
font_01_sfnt_off00006b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 18772 bytes
SHA-256: 9a55712549d24f40bd9168c897c03b6f38d3aaf5d93578d14a86cb5737851a0c

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