Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdc8a69e36d9d016…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 19:58:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 71694301a8cd0300846459990099ca57 SHA-1: aadf92766d0a5d9c6052afecde47d335cb98327a SHA-256: bdc8a69e36d9d0168382ba53696360899f893fc62df28d86683475617f3edfbb
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 0.9980

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 http://netcdn.co/app/431946152/free-robux-with-developer-tools-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-legends-for-free-assasin-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-items-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/tiktok-free-download-video_GM835599320.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-use-wurst_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-promo-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-robux-no-codes_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-in-roblox-kozock_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-noclip-download-hack_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off000030af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AF 21844 bytes
SHA-256: be61f7afa93172c355a81f0ad380c2b201161e5c0d3e40e3e7481e8e1977ee16
font_01_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 19836 bytes
SHA-256: d01132b9c84108ea04a501a9be9bc018e3a0899495acd50408a75d61fc114487

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