Malicious PDF — malware analysis report

Static analysis result for SHA-256 f262ae73a5804794…

MALICIOUS

PDF

36.2 KB Created: 2021-07-06 06:03:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6a6fa765808f02771895087bbf56c300 SHA-1: 281a177347d8354b437901de3338746f0ce3ce09 SHA-256: f262ae73a58047941e956426acacb5e535d7615e5f93065797ce80c5cfeed6dc
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 0.9980

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/431946152/how-to-get-free-robux-without-doing-anything-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-robux-2021-android_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/csgo-roblox-hack-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hacking-ldshadowladys-roblox-account_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-admin-commands-dll-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheating-youtube_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-tools-to-hack-roblox-on-android_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-groups-with-funds-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-with-no-virus-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-human-verification-or-survey-2021-on-ipad_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-i-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-boombox-on-roblox-script_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheats-codes-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-friend-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/dantdm-com-free-roblox-accounts_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_002_off00003390.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3390 22672 bytes
SHA-256: 1069f3d8a27261d36db00825d358386c122b2f3f655700bfea8297d5eae3df74
font_01_sfnt_off00006622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 19816 bytes
SHA-256: a89a9c26f3e3a3213b52b81013f05ff3695d44fb7be09e02fac6d25675b35ef4

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