Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc1e6d349005454…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 18:10:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 66a21682a7c12548b17a5e0a4075f731 SHA-1: 58545f75c4562adf5d8b40b3f7ee1561826b36f2 SHA-256: 3dc1e6d3490054540c0c42389bcdbac588dcb4a39480c4a32b750955fefaa9b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

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 http://netcdn.tw/app/431946152/roblox-hack-me-game-hack PDF link annotation
    • https://www.sarsen.net/uploads/files/files/anti-speed-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/tiktok-free-app_GM835599320.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/como-se-puede-ser-hacker-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-with-only-username_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/console-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-hack-in-roblox-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/dragon-ball-z-rage-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-games-for-free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/roblox-hacks-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://www.sarsen.net/uploads/files/files/como-tener-hacks-en-roblox-prison-life_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
font_00_sfnt_off00003127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3127 22548 bytes
SHA-256: eab153c10c6e311e72ab71ea6c7d1e40ed64d2522fec5a659a5a48f2810fdb25
font_01_sfnt_off000063bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 18852 bytes
SHA-256: ae5bbd1016d3eca5969145279625dbf0af4bdaae54505d1f649a6545bf5fde29