Malicious PDF — malware analysis report

Static analysis result for SHA-256 5028c485ae0c26e3…

MALICIOUS

PDF

48.4 KB Created: 2021-06-11 03:02:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f5488ba7ee654d260ced9c5a75e60eb3 SHA-1: 6834bd6da86abbd7981bf1383e67ce21ce4574c3 SHA-256: 5028c485ae0c26e317c5ffd35e1305a396908f9d2389c983987d63547644d823
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to malicious redirectors, specifically advertising "free generator / game hack" lures. The primary redirector URL is https://netcdn.tw/app/431946152/new-roblox-swordburst-2-hack-game-hack, which likely leads to further malicious content or malware. The document's structure and embedded links strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.tw/app/431946152/new-roblox-swordburst-2-hack-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/best-meliodas-roblox-face-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-place-downloads_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/jailbreak-script_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-code-in-muder-mystery-2_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-templates_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
stream_004_off000050f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F5 35076 bytes
SHA-256: 09b0e78e1bc3eb9c06774dd6af3893b5e93640578643403724f768b809de583a
font_01_sfnt_off000098e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98E5 18888 bytes
SHA-256: 242b2c6d5c9ba45277fd1eedf377973407cade8cda700530cc5f7504674db33b