Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8bc1dc3a6901dd…

MALICIOUS

PDF

45.4 KB Created: 2021-05-13 16:39:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6445c35bafab4a885dbcb2ce27f73497 SHA-1: 430490338aed6053662a92a0e6fd843a10bc09da SHA-256: 5d8bc1dc3a6901ddb727d7d11790462c16c0201bf2c64cf1442c91ebd5a99ef2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a 'free generator / game hack' redirector, specifically mentioning 'free Robux'. The document body and extracted URLs reinforce this lure. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/to-get-free-robux-game-hack PDF link annotation
    • http://medinup.pt/images/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-free-reddit_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/robux-earner_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A3 24840 bytes
SHA-256: 4dd8669b1f119db80e0eb61dd090f2522af720c150a0df8135a252c684fc057f
font_01_sfnt_off00008227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8227 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off00008f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4E 18120 bytes
SHA-256: 5233d5aad1bcdd77905869674ceee15891b0fc77671f16174d37808cf9f58ee1

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