Malicious PDF — malware analysis report

Static analysis result for SHA-256 355aaaecf8032c9d…

MALICIOUS

PDF

33.0 KB Created: 2021-07-03 15:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5911db07a97c2fbfb310096b84fea147 SHA-1: d4473e871a419d10c094b83fbf0cd3db5802bebb SHA-256: 355aaaecf8032c9d39eca5433e10af67c38ea2a0cd05e701fddc5549e8f67357
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-coins-and-spins-coin-master-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/what-is-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-for-kids_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/schoto-roblox-free-shop-hair_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacked-server-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-for-roblox-the-mad-murderer_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-vampire-hunters-2-roblox-fly_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-robux-com_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-roblox-reddit_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/high-school-musical-breaking-free-roblox-id_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-catalog-script_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_off00002d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D97 21892 bytes
SHA-256: 591b49928b4d056b9dbacaa55716dc5c85060f7caa43cedf077917c5370293bb
font_01_sfnt_off00005dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DC7 18348 bytes
SHA-256: c90f632020bcb1e728f62a43997badda2860e0d329262e99dedc1f8a12c39115

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