Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f80ee08ef8ed83…

MALICIOUS

PDF

42.3 KB Created: 2021-04-30 01:43:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5a402f520bc041242efd1a307d99d195 SHA-1: a16c6fda3fbc63bee272cc96a2e39b087020a17c SHA-256: f1f80ee08ef8ed8312eb195610e9165a689be123882b255375f5bb5526e6355c
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 0.9941

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/zombie-attack-roblox-cheat-engien-game-hack PDF link annotation
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/code-cheat-card-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-free-robux-dylan-grant.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-colouring-in-pages-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/is-it-hacking-if-i-use-autoclicker-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/ultimate-random-night-how-to-hack-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/hack-para-tener-robux-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/follow-bot-roblox-hack.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/nike-shirt-roblox-free.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-alien.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/free-robux-counter-for-roblox.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_off000043bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43BD 26256 bytes
SHA-256: 91007ae037d1d011ff736ff2af76bac0b4f4d69f2c3fcdd12859ab4a919e3e51
font_01_sfnt_off0000812a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x812A 19216 bytes
SHA-256: 7eca2dc078869438ec4d63a94921883da9e638aa71ee19c0ae0369d3e6ae02d3

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