Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb079c292f8bec2…

MALICIOUS

PDF

38.0 KB Created: 2021-05-21 03:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dc1e2c8c5e3b9fc301f9fbeb02fc764e SHA-1: 3c872e2a493f0cc14831784b5be9ab01a6736349 SHA-256: 1fb079c292f8bec28b84f96ff37c98261f698dbb62a6c3977d5350ce0d6a88a9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. 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 0.7010

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/835599320/free-tiktok-bots-game-hack PDF link annotation
    • https://loba.com.vn/public/upload/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spin-sites-for-coin-master_GM406889139.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_002_off000031b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B9 24664 bytes
SHA-256: 3084ab29b3563bfc330a6ce2ff8024f4c7695952b322fa0b7a71986a96cf7b71
font_01_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 3124 bytes
SHA-256: d6dd29adb69da7f9a23a5e3791282a61e2f811794f560a0c409c8747766d9102
font_02_sfnt_off000074e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E4 17672 bytes
SHA-256: 83a0af7587fde9e4cb54786aef6824729efdfe72bd6282daf62b8eaca0103fce

Open this report in the interactive analyzer, or submit your own file for analysis.