Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4bb860f52cbb933…

MALICIOUS

PDF

34.7 KB Created: 2021-07-03 18:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9dca53660a97bbe633f4803170efc09c SHA-1: 42407fdebd219d029071f5924ee6f278c94c8dfa SHA-256: d4bb860f52cbb9330355d99df6cf5c1d522c21ea29be8804b9f495d47c5ae9af
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. 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 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/835599320/free-tiktok-followers-without-verification-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-that-works-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-roblox-boku_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-btools-from-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-money-on-rocitizens-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-1_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-tab-font-free-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-animation-roblox-june_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hex-number-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-apk_GM406889139.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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22680 bytes
SHA-256: 01f91df17189da881c96884ca24f150fd07a7f344441b3f9b499fdf5f712ef12
font_01_sfnt_off00006329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6329 18848 bytes
SHA-256: a6962a1c22e4c901e09cc79e54a35af6e59d852732f3ebf76052f8fdc15db483

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