Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2bff465f13ce39…

MALICIOUS

PDF

47.1 KB Created: 2021-06-11 12:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 87afd19c36e5074c93df3eb45549e726 SHA-1: 260234dbe4e56eb5d4305a2edc60a02845aa05cb SHA-256: dd2bff465f13ce39d48576b1ec8e17d52f737012761b98f8d5c46fc0ffa0fbbf
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites that promise game hacks and free in-game currency, a common lure for phishing and malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/dead-mist-2-hacks-roblox-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/robux-miner_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-code-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/como-descargar-coin-master-hackeado_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-2021-apk_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_off00005238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5238 28316 bytes
SHA-256: 4539d04025b22364b56e4bcbbce1e4f9d185f430003a3687f863ee3aa8ef8da7
font_01_sfnt_off0000935f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935F 19068 bytes
SHA-256: 414f18db41b5e0b25c872dc267fd88ee3dc78606d609ae5ccff77b94296cc379

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