Malicious PDF — malware analysis report

Static analysis result for SHA-256 2433132a8411c9d2…

MALICIOUS

PDF

33.9 KB Created: 2021-07-09 06:02:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 14604429ce35fb0aea58147165e2cb9a SHA-1: 34149d59106fb09062177f8db77d5f25071da545 SHA-256: 2433132a8411c9d2ec6cd8a2d8f6fbf3cd96183eff0a1379b15f590e581092ae
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The primary lure, 'free-minecraft-client-game-hack', points to the malicious URL http://netcdn.tw/app/479516143/free-minecraft-client-game-hack. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or malware delivery.

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/479516143/free-minecraft-client-game-hack In PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-robux-giver-no-survey_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-kat-hacks_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/tiktok-for-free-install_GM835599320.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/roblox-urbis-hack-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn8majalengka.sch.id/__statics/gudangsoal/files/get-free-robux-now_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_off00003131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3131 22360 bytes
SHA-256: b8ab7792b0a5663e37c3ddf684d8359bda95bbce837086bc6670995f547dad55
font_01_sfnt_off000062e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E3 17928 bytes
SHA-256: 06737be40afdd7807bcb221f1242e15b3899983b357bc9904bb842239db889be

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