Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75e9f5ca13ef7ca…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 04:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: fd24064c654dd1b5fb84c26a809677af SHA-1: 815c1cd7d09bb43b0f5d2b1538265258cd7b58f8 SHA-256: a75e9f5ca13ef7ca3f84d163fb871f69e6ee3e287c563fede4428c1f52b90561
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on "free generator" or "game hack" websites. The primary link, http://netcdn.co/app/431946152/how-to-get-free-robux-legit-game-hack, redirects to known malicious infrastructure. The document body and embedded URLs suggest a scam related to in-game currency or cheats, likely intended to lead users to phishing or malware download sites.

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.co/app/431946152/how-to-get-free-robux-legit-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-on-a-ipad_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/instantrobux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/best-free-roblox-t-shirts_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/tiktok-free-key_GM835599320.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-pe-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/www-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-generator_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_off00002ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA7 21948 bytes
SHA-256: d56880a5ca1ebec0ead976df7e32efe5dcdc1382aa0096887ab8c561f1696300
font_01_sfnt_off00005f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F13 18920 bytes
SHA-256: 670c546fb1cd966c46cfe221305ad8f0b0187f6a65baaf0e839baff802fefadb

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