Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d8459446a94a080…

MALICIOUS

PDF

31.5 KB Created: 2021-07-04 23:55:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7d51721eeee6d903a469a96084a33bed SHA-1: 7e7dffc04646b13818757071d4578a384c4969c1 SHA-256: 8d8459446a94a0807684f19cc04673ec8a144f90fe5d29de7d0ed50b262d2dd6
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 0.9774

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/1330123889/is-pubg-uc-hack-possible-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-800-robux-free-gamekit_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-admin-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-link_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-high-vis-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cheat-engine-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-website-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/cube-eat-cube-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-250-000-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-teleplate_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/account-stealing-hack-roblox-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_off0000284e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x284E 21472 bytes
SHA-256: 4d9b0fba0c31bc78658a62067bc3c4f81d35e360481cb885b4ba01d655fcb955
font_01_sfnt_off00005763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5763 18632 bytes
SHA-256: 0b9601a978810063e439b5086895ebe293832f1a71f6ed1b327824e74e625449

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