Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9fa1545a8933112…

MALICIOUS

PDF

32.6 KB Created: 2021-07-09 08:18:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ec9e59ce85b28d0bf9915cb6897d09d2 SHA-1: bc00e88e4c5cfea0acec1e7380daa4594b9d5fb9 SHA-256: e9fa1545a8933112598ffb77107eb5ecbe6e7108a9aef97bf966f23675a26ab7
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 0.9824

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/406889139/coin-master-hack-spins-app-game-hack PDF link annotation
    • https://vieclamjapan.com/upload/files/cheat-phantom-forces-roblox-2021-level_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/hack-in-counter-blox-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hacks-2021-free-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/robux-hack-no-download-or-survey_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/undertale-survive-the-monster-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/what-is-exploiting-in-roblox_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/free-robux-no-vertification-no-survey-no-pasword_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/fortnite-roblox-play-free_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/roblox-hacks-2021-june_GM431946152.pdfIn PDF document text
    • https://vieclamjapan.com/upload/files/how-to-get-free-robux-on-ipad_GM431946152.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_001_off00002a44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A44 22884 bytes
SHA-256: 30defbdd61d4a80f99338c62c3780ed66a233a1c1344c8af1d7517c8f623f413
font_01_sfnt_off00005d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D50 18180 bytes
SHA-256: 1e953b72540ec4677b5f3a09436cf02581c7252e246dbe5ac414cafa51ba2d5d

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