Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e559dcbe95f7897…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 11:14:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 057ed4b1462c99f556a7301cdd5d17f8 SHA-1: 166ac928ee479f07e81d94b5ae3a15227ff3569f SHA-256: 4e559dcbe95f78978ba02e7788e2565ba22bebadaac173e7915a8cbc0ffeb6a1
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 0.9769

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 https://netcdn.online/app/431946152/how-do-u-get-free-robux-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hack-robux-redboy_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005132.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5132 25148 bytes
SHA-256: 3277e993835c7aa67312ce3c2599c15f7e6c22b54833febdcc52808a9895c19d
font_01_sfnt_off00008b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B93 2892 bytes
SHA-256: e0a0e7499c3dd10c5114bd1538d6e258e6cb3acdd4f79d9538668087a4bdd2cc
font_02_sfnt_off0000957c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x957C 18636 bytes
SHA-256: ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e

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