Malicious PDF — malware analysis report

Static analysis result for SHA-256 70cce51c64420e24…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 14:02:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bd13945400a32f0dd7bbf6bf8ca72452 SHA-1: 0fa324589bbbb9c69d01d7c06fb21dee9d9e3a98 SHA-256: 70cce51c64420e242289d96b5ea2e783d84faf179838978017bd6c277e040e2c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of free game hacks and cheats to entice users. It contains multiple embedded URLs, including a primary redirector at http://netcdn.tw/app/406889139/coin-master-free-spin-link-today-2021-game-hack, which likely leads to further malicious content or exploits. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms a malicious workflow.

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-spin-link-today-2021-game-hack In PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/roblox-free-goft-card_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-roblox-troll-outfits_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/www-roblox-com-play-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/wurst-18_GM479516143.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/btools-roblox-hack-2021-working_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/how-to-make-a-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://elearning.min1lebak.sch.id/__statics/gudangsoal/files/to-get-free-robux_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_off000032de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32DE 22460 bytes
SHA-256: 605e9bca6f9021d89c6a876568d2f6ae2fce3b50080a60b95b57b85258f3746c
font_01_sfnt_off000064ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 19100 bytes
SHA-256: 87948dd456158924639af78db2b6f448ba4bec773812a2cc2fa62bc058a3e5dd

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