Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fa61d5b7ebe1ff…

MALICIOUS

PDF

43.5 KB Created: 2021-05-11 19:45:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 41a0aaf487f66136ef4214480ad40392 SHA-1: 55d54c5167c07de18a25c9148f5ff15640cd6dd0 SHA-256: 89fa61d5b7ebe1ffb672a63310fa9d0d48e32276107c05eafdab920209b74c3d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially malicious content, likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-download-game-hack PDF link annotation
    • http://charivne.info/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-online-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://charivne.info/ckfinder/userfiles/files/roblox-studio-free-download_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_off00004b20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B20 25484 bytes
SHA-256: 28e1a87e1149faf0fa342b3a9f88121fb2c842412e71e6c3db70988ba5c62478
font_01_sfnt_off000085fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85FD 18824 bytes
SHA-256: a83584a15d83770571e134086905248a9fe783ccc3b424d06d308178a7ec7f42

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