Malicious PDF — malware analysis report

Static analysis result for SHA-256 761c567aa94165cf…

MALICIOUS

PDF

37.2 KB Created: 2021-07-07 23:07:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f28882b0639a930cabb37e78867d03f0 SHA-1: 8e2956fa1b03141a02c80ff25d2b4e2db84f9131 SHA-256: 761c567aa94165cf6a40a19025d91c73b08e44857c793a426eb82d2d1a3b5c4c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-spin-gratis-coin-master-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-black-hole-pack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/hacking-2021-members-into-my-group-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-corruption-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/addrbx-earn-free-robux-by-doing-tasks_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-i-change-back-to-old-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-no-human-verification-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/tears-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/i-got-hacked-in-roblox-albertsstuff_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-roblox-charecters_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-avatar-customizer-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-free-permanent-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/http-www-cheatsguru-com-pc-roblox-cheats-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-hack-minig-simulator-v3rmillion_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-put-scripts-in-roblox-hack-in-your-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-blogspot-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3254 22580 bytes
SHA-256: 6f8942c2c504b50402590d10b79ce3a77cd2f0aa04803e3c0172e5720e3a4a7a
font_01_sfnt_off000064f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F9 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDE 18176 bytes
SHA-256: 18c2c947ef46c372341a4a1bc1ad78c4cd46a49342db834d5caa4979205468cd

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