Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fef587208fb2c0…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 06:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 63318f0a8b6a6ed6ab0103e559f22451 SHA-1: 09b509e511690e141695d71c6fb027534b822846 SHA-256: b2fef587208fb2c03fae3afec1c8417fdd9fc2bce654910f7c080a5bc5d68578
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 0.9971

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/406889139/2021-free-coin-master-spins-game-hack PDF link annotation
    • http://dennemaat.nl/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/roblox-earn_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/easy-robux_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/coinmaster-spin-ml-free_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dennemaat.nl/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://dennemaat.nl/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://dennemaat.nl/images/coin-master-free-spins-youthnow_GM406889139.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_off000047ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47EC 26192 bytes
SHA-256: c087702c1e2a15a32a2b4b3f90437719c78563c34e6cf8095b422a9c360d40e0
font_01_sfnt_off0000840c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x840C 18288 bytes
SHA-256: 09d15d14e106b24b2cc1eb8b87d838b97387230385a3ba043ca38e77a01d007f

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