Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecadc6108c0a4b19…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 14:22:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 937a307d953c323f68162c0aabaa220e SHA-1: 13cf5c07d775c4bb68bc913476ef4e3858e009a9 SHA-256: ecadc6108c0a4b19b37a6e1cb77f9c47104820fbc1c503ecc919f9765bd7bd3b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-with-no-human-verification-game-hack. The document body and embedded links are designed to trick users into believing they can obtain free Robux or game hacks, which is a common lure for phishing or malware distribution. No scripts were extracted, but the presence of malicious redirectors and the lure suggest a phishing or downloader attack pattern.

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.tw/app/431946152/free-robux-with-no-human-verification-game-hack In PDF document text
    • http://perpus.stmik-im.ac.id/repository/getting-my-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-shirts-id_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-character-customizer-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/stickmasterluke-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-free-weapons_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-atravesar-paredes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-jailbreak-hack-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-gift-card_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-running-in-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-for-trasure-hunt-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-copy-right-free-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-accounts-discord_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-dominus-hat-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-murder-mystery-2-hack-2021_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_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22620 bytes
SHA-256: 838b04148a5794367c3663fd16024fbd8c831d3439acc0c2982b213fa6bffa29
font_01_sfnt_off000063d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D8 19700 bytes
SHA-256: 35e501b9c45e5927f0fc62a5ada2d4fbbc4f1128da3636f490de4bd32383e5b5

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