Malicious PDF — malware analysis report

Static analysis result for SHA-256 689ca8c3bbb55bd0…

MALICIOUS

PDF

57.2 KB Created: 2021-06-03 16:18:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 38046caf864791f08931f97ee5a92bd0 SHA-1: 7f20944985988b5d000dfbed4ef5c0f26c232c36 SHA-256: 689ca8c3bbb55bd0ea078148564fc584226f5acd2f18792756b4dcf61ed2bda8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The primary link identified is https://netcdn.online/app/406889139/coin-master-hack-apk-latest-version-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attempt to lead users to potentially harmful content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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.online/app/406889139/coin-master-hack-apk-latest-version-2021-game-hack In PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://mtsn4.ykt.my.id/__statics/gudangsoal/files/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000520a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x520A 26468 bytes
SHA-256: 25b8ad83f24d36069acb867d0d8f595ebab82c0ec7ac8ce53728026e0e65fa29
font_01_sfnt_off00008f24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F24 3208 bytes
SHA-256: 1872c438adff3cd1e4653fd6ea5f194979703fda467ab1ea234b189540949db3
font_02_sfnt_off00009a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A5A 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000ad7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD7F 18428 bytes
SHA-256: 3ea7a61419cbe52eb029f29c9b150dae48cf78ebe9ef7deec7bc9e8a272032f3
font_04_sfnt_off0000d030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD030 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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