Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c0a146e8a2b5d0…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 17:01:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 1397d99ba7603f2040cd297ceea99535 SHA-1: 53c39e57723b334b705a1c12c671669b6dfdd3ae SHA-256: 58c0a146e8a2b5d074fa38590a8eb5153c8df5533a10f59fadc3e80b260ac8c9
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-daily-coin-master-coins-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/hack-coin-master-game-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/tiktok-free-or-not_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/roblox-g_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/fb-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-install-minecraft-for-free-on-ios_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-free-spins-and-coins-daily_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_off00003358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3358 22524 bytes
SHA-256: db183698cbe972166eef0a6b1b2867f792aedfbb7391824913d2ddfa72c4ed2d
font_01_sfnt_off0000658c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658C 18420 bytes
SHA-256: a746bb805760b15596d5c6c3484423ee939af8cec1bd760416259ea5ac6d7b8c

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