Malicious PDF — malware analysis report

Static analysis result for SHA-256 192a7ad1fb1c93fb…

MALICIOUS

PDF

33.4 KB Created: 2021-06-26 23:11:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da21c31d5277a39909cb4d528e11740b SHA-1: 08fe2ff48585c6936ce964d0002d3d623121404e SHA-256: 192a7ad1fb1c93fbd658ec3569336f28a348b771d28d7a152f98f7d3d9583302
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users searching for game hacks and cheats. The primary lure is related to Roblox game hacks, directing users to URLs like http://netcdn.co/app/431946152/hack-jeux-roblox-game-hack. The extensive use of link farms and deceptive lures suggests a phishing or scam campaign aimed at driving traffic to potentially malicious or ad-heavy sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hack-jeux-roblox-game-hack PDF link annotation
    • https://foc.vn/public/upload/files/free-game-pass-all-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-talk-to-roblox-if-you-get-hacked_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/check-cashed-v3-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/robux-hack-generator-2021-no-download_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-roblox-account-robux_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/hack-robux-2021-engine_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/daily-free-spins-for-coin-master_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
font_00_sfnt_off00002d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D00 21976 bytes
SHA-256: 16c68d5d150b3ea1a7f6d4de5da84755a7812357a4f1aee26fc7a019b9b020a5
font_01_sfnt_off00005da5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 18964 bytes
SHA-256: 50a3f3b524c9d0edacb826a204a2c1fd908962f6df811749a714b9469f4b96e8