Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1487c1fa01dc8ea…

MALICIOUS

PDF

45.6 KB Created: 2021-06-03 21:59:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8561103809af1440748010ac394beee4 SHA-1: 0af68ed4c1ade029fe2b1368977446eb965b8661 SHA-256: a1487c1fa01dc8ea531a3e74cdb738edfd42c62c40287ddf8c9ee9a70e69ffc7
82 Risk Score

Malware Insights

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

The PDF document contains a lure for free game hacks, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the presence of multiple game-related lures suggests a common phishing tactic. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/479516143/minecraft-marketplace-free-game-hack PDF link annotation
    • http://www.js100.com/uploads/ckeditor/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-games-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-cheat_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-website_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-clothes-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/minecraft-free_GM479516143.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_off00005257.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5257 30816 bytes
SHA-256: 2db4308771b89fd0e95c0f5bf1ca08c9b601b9820e0ba3e78f8e0411ebe660c5
font_01_sfnt_off000090db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90DB 17988 bytes
SHA-256: b1962b8150a92058b1af596ee40f39d874ebba3a387c6f99a175120b94cdb42e

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