Malicious PDF — malware analysis report

Static analysis result for SHA-256 320ed52b91899c77…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 19:55:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: b963c4ebb3398ac5075ae0775be21357 SHA-1: 12084cdab99d86cc9ae7937041777a8d23ae35e0 SHA-256: 320ed52b91899c77f84c98d4743a85f8453ab0ef48b135c15ed83d73a45a5dff
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/coin-master-free-spin-ml-game-hack PDF link annotation
    • http://perpus.wdh.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/how-to-make-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-spins_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/free-robux-with-inspect-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hacker-simulator-code-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id//repository/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/hack-de-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://perpus.wdh.ac.id/repository/coin-master-free-spins-1701-20_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
stream_002_off00002ffb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FFB 23160 bytes
SHA-256: 3afd162aa703274ea8e24769aa42d443f7d277c8ddc5828f7c05bf3823d2d0d5
font_01_sfnt_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 18248 bytes
SHA-256: c18038b999a15e068e0fcec6b3cb299d21e05aa15a09c32d3b19c8c95a871ee0

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