Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93f6459e860c3ce…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 04:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9670df996b78f988675847980632c9be SHA-1: 27dc5e34f52eaf485c8249440a3b2ba11bf228ae SHA-256: b93f6459e860c3cee7240e33fcedaf841d42482065abb8a258c4a0660eb90555
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-unlimited-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-codes-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-money-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-shirt-template-with-neck_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/boxing-simulator-2-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-roblox-admin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-anime-cross-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-2021-easy_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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 22552 bytes
SHA-256: a54dedf345c61bce2c5b044870c8f7576914c98366eb6463c6ebcce27ed7fed3
font_01_sfnt_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 18868 bytes
SHA-256: 2ae514214ba8136a29dde69fcf4364d8dbb9380ba0bdd85285d9bbc1786d9168

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