Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f1d7bde77410888…

MALICIOUS

PDF

48.1 KB Created: 2021-06-09 07:59:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d6a2cca9429ea7e7346dadb7b688f577 SHA-1: 69f633332974f562aa68339183b360294f3a8735 SHA-256: 4f1d7bde774108886741e7f9ff5283a1b8dfbf8d2993427fcc220449039781ff
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document uses a lure related to 'free wings in Roblox' and impersonates Amazon to trick users into clicking a malicious link. The ML classifier strongly indicated maliciousness, and the PDF contains embedded URLs that redirect to a suspicious domain. While no scripts were extracted, the document's structure and embedded links suggest it is designed to exploit user interest in game-related cheats to facilitate credential phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/free-wings-in-roblox-2021-game-hack.
  • 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 https://netcdn.tw/app/431946152/free-wings-in-roblox-2021-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/sonydeveloper-hacking-on-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-online-game_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-galaxy-money-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-hack-coin-master-in-pc_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/tiktok-free-view-10_GM835599320.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/by-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E3 29128 bytes
SHA-256: 00573047f150ebce8c1808030c84e3b631c8c054c99cce48e2f48bc0be7a2df0
font_01_sfnt_off0000976e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x976E 18956 bytes
SHA-256: b8e2419ec80c098f4fdbaaea6f7afd1ba5d3549b5e12ac6c25345d4a5bb5d7f4

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