Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b82e1f6b1ed6d9…

MALICIOUS

PDF

36.4 KB Created: 2021-07-03 18:52:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 750359e7b317ac266031fde95bc668e6 SHA-1: f67a509e4cde9d5c83d1c7aaffe1b30fdba210d0 SHA-256: a9b82e1f6b1ed6d938c997438d0eb9d20e91f56d23b9286ddcb1a86a5dc6920f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs supports a phishing or scamming attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest it is designed to redirect users to potentially malicious content.

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.tw/app/431946152/free-robux-generator-no-human-verification-2021-game-hack PDF link annotation
    • https://mountainholidaytreks.com/userfiles/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-spins-link-2021-haktuts_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/pokemon-go-free-quest_GM1094591345.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/roblox-boxing-simulator-2-hack-xbox_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://mountainholidaytreks.com/userfiles/files/coin-master-free-coins-and-spins-hack_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_off000036a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36A7 21984 bytes
SHA-256: cf9002777507d52208f8996aaade8753bb28e5bbff92fc90a7abb10c3283db92
font_01_sfnt_off00006779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6779 19736 bytes
SHA-256: 09f061b847c63ff59f035118bd628253d90c30315b77b042e81f05fdb0d3e9b1

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