Malicious PDF — malware analysis report

Static analysis result for SHA-256 83842de715767dd5…

MALICIOUS

PDF

44.0 KB Created: 2021-06-07 03:44:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eeb9529081c58ad91a047bc6e7b6390d SHA-1: 49d0114379fcb5d12408608e87c7ea7e2c8317dc SHA-256: 83842de715767dd55401d53fd96a034a7f5c6b7c45dee350ea656f58edb13640
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 0.9865

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.tw/app/431946152/free-roblox-rig-game-hack PDF link annotation
    • http://taskcyg.nl/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/coin-spin_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://taskcyg.nl/images/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • http://taskcyg.nl/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://taskcyg.nl/images/free-minecraft-hacks_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_off00004ef5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EF5 25408 bytes
SHA-256: bd4c30cde1e5cbb20db2b095ee50c35d5917d4877a2a41a4232cb0d1fed28293
font_01_sfnt_off0000894b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x894B 18356 bytes
SHA-256: 2dea8ce67f266fe3feea9d9e5513ea11bbc68de91bfd5003e9881ab4edd3460c

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