Malicious PDF — malware analysis report

Static analysis result for SHA-256 5620bf5d3e49a7b1…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 09:11:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 38766d16a4b309893bb7fd85c8b1965a SHA-1: b5178c9af452b4492c49f82642caba710ff70d4e SHA-256: 5620bf5d3e49a7b1d6dfd61b9d35edb10df72f6a7f3cccacbc9ed72f7d52c01f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are advertised as "Coin Master Hack" generators. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates a social engineering tactic to trick users into visiting malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to download potentially malicious files or engage in scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-apk-no-survey-game-hack PDF link annotation
    • https://citramandiribor.com/ckfinder/userfiles/files/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/corn-master_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://citramandiribor.com/ckfinder/userfiles/files/free-robux-today_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_003_off000049c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C3 24972 bytes
SHA-256: f8e65bfc3d691c7d45d4a0266dbec6e2ab1fbdac50e815be1a1de2cec85bc843
font_01_sfnt_off0000825f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825F 18328 bytes
SHA-256: 44ce5971fd5edf6fbd4f1d011f246de402cc390c11e0c8a7f8b59bac61d46267

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