Malicious PDF — malware analysis report

Static analysis result for SHA-256 da953b6158d471d9…

MALICIOUS

PDF

44.9 KB Created: 2021-06-09 16:36:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 73638dd858326bb0b90ed14732cd4a04 SHA-1: 5e0646873fb3b769a743954b84f2578fd9ef74b9 SHA-256: da953b6158d471d9836347282b5bb80351d75202f42eeafdc0baf6c6f59a6919
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 0.9865

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.tw/app/431946152/roblox-booga-booga-noob-vs-pro-vs-hacker-vs-god-game-hack PDF link annotation
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/hack-coin-master-site-rssingcom_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/robux-withdraw_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
stream_004_off00004e0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0F 26672 bytes
SHA-256: b86c51a564b0c2f0bbb216cb8c0f5850f6e6bbeb378702a6be0698cb325fdf6a
font_01_sfnt_off00008aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AAB 18932 bytes
SHA-256: f0c6a2602d44509a9838d5c104e4a1abb242d39c5b03117af9ca873f4d3b4815

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