Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadb71a6d830a76d…

MALICIOUS

PDF

35.8 KB Created: 2021-07-03 22:48:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 101c2af458c117492ade228189b5863a SHA-1: 97872a0bae95053a3758315380be2ccdf45a7187 SHA-256: cadb71a6d830a76d570b5271f38020ef6a23a89dac058cd2d71b38d2d10716b6
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/406889139/free-spins-coin-master-links-game-hack PDF link annotation
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-weight-simulator-3-cheat-code_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/synapse-roblox-free-no-virus_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-robux-february-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-points-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/play-roblox-on-ps4-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-get-free-robux-on-ipad-easy_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-hack-money-in-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/hackear-y-tener-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-robux-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-free-downoad_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-roblox-without-downloading_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/best-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-download-pc-hack_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-mods-hack-apk_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/free-roblox-accounts-2021-april_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_off00003369.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3369 23632 bytes
SHA-256: 0db2a6c34f4e91b508ac9dff51f47bf0671e68ee09008df87e866d95dd72c974
font_01_sfnt_off00006926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6926 18344 bytes
SHA-256: bbd45a100c9fda56c98402c01c945e99ba5b23a8a144929349c4b2a582275d64

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