Malicious PDF — malware analysis report

Static analysis result for SHA-256 b503315ea7e7ee0d…

MALICIOUS

PDF

41.3 KB Created: 2021-05-10 14:39:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 05ea25da1764cc51012c0a62aa0762f9 SHA-1: f23573085c3415e382990cf618e31fc444fc3b8e SHA-256: b503315ea7e7ee0d4b251ea1c0f267351180507bca7d81538cb498bba1d01df2
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a malicious URL. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into executing further malicious actions. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a likely attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-no-gift-card-game-hack PDF link annotation
    • http://force-seniorklub.dk/images/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://force-seniorklub.dk/images/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://force-seniorklub.dk/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://force-seniorklub.dk/images/roblox-font-free_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_off00003cf2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3CF2 29768 bytes
SHA-256: 6cc7f7579a56617561334ad961c3c55a99fcfd2304cc279bab981ba6aa2729c8
font_01_sfnt_off00007ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC3 18640 bytes
SHA-256: 5e2a3e67d4e6faa48e47b93c69738121aad1fd6f7e815cfd3538255806571323

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