Malicious PDF — malware analysis report

Static analysis result for SHA-256 25fa66d7a47ff195…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 15:18:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4746976d1f04082d7e85b5066b271cb1 SHA-1: b022016dc959da68d1b653e47e14d963b93e4c6e SHA-256: 25fa66d7a47ff195b28ab4320683d1abcd55387e168a86a5da9813ba3f4fa0c0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a game hack redirector, specifically advertising 'Coin Master Free Spins'. The embedded URLs and document body text reinforce this lure, aiming to trick users into visiting malicious sites. While no scripts were extracted, the primary attack pattern involves social engineering through a deceptive link.

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/406889139/coin-master-free-spins-link-today-twitter-game-hack PDF link annotation
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-fnaf-rp-how-to-get-free-via-lovechat123_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/buxgg-robux-generator-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-exucutor-free-download-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-ninja-animation_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/elite-hackus-exec-roblox-wd8_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/exploit-for-roblox-2021-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/free-robux-app-that-sends-code-to-your-email_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/hack-para-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/latest-free-spin-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/roblox-hack-engine_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.stikim.ac.id/slims/repository/greenville-roblox-hack-script_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_002_off000031e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E8 22756 bytes
SHA-256: 87b57bcdf9fb948b7642de7c72f7479793540cdc5dc61fcf65d36a9ea5fb739f
font_01_sfnt_off00006503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6503 18864 bytes
SHA-256: 2193e06c5c3e15f484914b1efa266409fa8c1e9afcaa84d0338c1082155419f6

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