Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb237e79eabda9f…

MALICIOUS

PDF

47.5 KB Created: 2021-05-13 06:55:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9a8091169d241b89e465c1309e16130b SHA-1: 855fc702aab46be404523484d66e05e738d2a561 SHA-256: dcb237e79eabda9f3f219ff5fab969a231a80c24d810a25c140a5bc8ce51f25d
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 0.9013

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/431946152/20210-robux-game-hack PDF link annotation
    • http://jdlwealth.com/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/coin-master-ios-gods-hack_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://jdlwealth.com/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://jdlwealth.com/images/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004af7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AF7 25272 bytes
SHA-256: ffd20ca585c3458704aed2d5c616e7fcdaecd1795f22c9a834d2bbe77cd2882e
font_01_sfnt_off000085d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D4 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_02_sfnt_off00009745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9745 18252 bytes
SHA-256: c6c6b837e22de3676a2ba596b9db5dc5a1db3890ceafc7e2998a39c6caf756de

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