Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc6b0489650b2814…

MALICIOUS

PDF

44.7 KB Created: 2021-05-15 06:04:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2b75450aebf24743c63bad7d94d93750 SHA-1: 9d608d6419d7fecc95d4b8f97f3cdfcead279813 SHA-256: fc6b0489650b2814f04503db1c87f17bbb9c0ee7fbf270ce8d6b2ab7d6a253dd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content, likely for phishing or malware distribution.

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 https://netcdn.xyz/app/431946152/rbx-land-free-robux-game-hack PDF link annotation
    • http://cleananddecluttered.com/images/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://cleananddecluttered.com/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • http://cleananddecluttered.com/images/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cleananddecluttered.com/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cleananddecluttered.com/images/free-robux-clothes_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_003_off00004aad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAD 28704 bytes
SHA-256: 9f5e195a8a50b78670c4992bfae3a82037e17c6b74b2ae393c918dc150c0d2a3
font_01_sfnt_off00008c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C40 18416 bytes
SHA-256: ed1846d837a30ccb27e25bdb955d82aabb746909bdcfb120b1e9cc4e6290fa01

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