Malicious PDF — malware analysis report

Static analysis result for SHA-256 f741c8f8d3b3352b…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 08:11:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c74a034f74c396116680b5605749374c SHA-1: 5d7d91d038a0dff4c90d96cc7878f58f0218a2b8 SHA-256: f741c8f8d3b3352bc1d55da02ca3776f5f70f374d1f958c08e10acd9f6928486
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/479516143/minecraft-hack-download-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/guava-juice-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-admin-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-para-tener-robux-enderobux117_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-accounts-2021-october_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-clothes-with-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-no-human-verification-android_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-generator-hack-best-voulu_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-u-get-roblocks-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-play-on-google_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-redeem-robux-code-free_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-stands-online-item-cheat_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comoponerse-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-free-robux-com_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_off000031eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EB 22292 bytes
SHA-256: abbb1d9f024d3d525f193c5c0dd4fd3347ba10c3769892730711dc124f629aa5
font_01_sfnt_off00006378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6378 18748 bytes
SHA-256: 7d976cf09cf6847225c0071798e8d9f98538d253ea26ac6bed308074c1f82c66

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