Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb350fdc9544fb63…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 23:16:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 82a75b56758ba8aeb6f71269fe90e34a SHA-1: df2a6a14d39178787fcd7cf56d79f565a599984a SHA-256: bb350fdc9544fb63ec0764055703f905d835166b5754066232ad0d3d3e98e422
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/431946152/bux-life-free-robux-game-hack PDF link annotation
    • http://olesya-chagovets.com/images/freerubux_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-ban_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-free-spins-link-2021-twitter_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://olesya-chagovets.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://olesya-chagovets.com/images/2021-free-coin-master-spins_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_off000048cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48CD 26052 bytes
SHA-256: b57b45c3452bc194ca0d60b313427ef63e8db55e59bdf50e15fccdc7bb3f7c7d
font_01_sfnt_off00008600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 18136 bytes
SHA-256: 29dc967668ee0d992c179c4e94ca6f9cb219d50b5ccf800f63d20fdab69e699e

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