Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1f547649c9aac74…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 17:38:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: fdcf5367e16bf421ce3c5b7765b19894 SHA-1: 573bf446cb3afd225b03d37f3e6dab38e0c93431 SHA-256: e1f547649c9aac7484979fc61852c729feab08110bae563a594f2370902b48d4
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/how-to-send-free-spins-on-coin-master-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/free-robux-hurry_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/rbxdemon_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/administrator-badge-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/tiktok-free-10-likes_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/robux-hack-without-survey_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-points-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-roblox-tank-top_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/all-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-case-clicker-hack-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/how-to-get-infinite-robux_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_002_off00002fe4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FE4 22676 bytes
SHA-256: 39599bc4dc3441905889dbf2c39a7e33cf09405b849c9b21606fd96b950f7954
font_01_sfnt_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 18512 bytes
SHA-256: d1cbb3129a910aeedd4cd76ee28c1c86387a15fa69f74c6599f9f835bc102733

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