Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a71ea1158c123a…

MALICIOUS

PDF

37.1 KB Created: 2021-07-06 08:22:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 04d857478fe7917025437e3e7496d569 SHA-1: 703d83d973b6cd4db0f7fd13cc18e5615c00addb SHA-256: 17a71ea1158c123a08235cd29a4526160bb774d110f7aaa90e6ab052c1483754
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector at http://netcdn.tw/app/406889139/coin-master-spins-hack-2021-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising game hacks and free generators. The presence of a malicious redirector suggests the document is part of a phishing or malware distribution campaign.

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-spins-hack-2021-game-hack In PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-minecraft-maps-pe_GM479516143.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-robux-hack-deutsch-pc_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/robux-converter_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://elearning.mtsn5blitar.com/__statics/gudangsoal/files/free-minecraft-hacks_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_002_off00003997.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3997 23336 bytes
SHA-256: 5f0913c232ec220c6993ace6a1e050ee19827e3ea7b7e8667500efcc8a7f57c7
font_01_sfnt_off00006d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5F 18580 bytes
SHA-256: 63d6adc7563b485c3174704ac8a7a6a262dc9bf1deaf17837918a23c7f43ebb5

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