Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9509be99a5244f…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 22:00:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e1ecc0410cf6b9fae883047c9cb0c004 SHA-1: 888d255c004ccd51bc32946bfd71a52346d8f098 SHA-256: 1a9509be99a5244f02e9a3eb975093febccadbb8eb6521a4249bd758dd50c93a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9864

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/roblox-free-robux-hack-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/pokemon-go-free-yawn_GM1094591345.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-survey-or-human-verification_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_off000052ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52EF 25804 bytes
SHA-256: cb0121c4fbc0ed92d1584fd3b2e88ae8ca31b54d8e3a21e88d44300fb812598a
font_01_sfnt_off00008f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F35 18488 bytes
SHA-256: 44072fbb5c45a7604268a2c6438126b7db3492802a9c8847ecb07522db400813

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