Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d19556461307ce1…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 17:08:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c42dbfe881321db6c67dd414601a3a7 SHA-1: d55a19c0a7c0147623ba83970c85a906821dd422 SHA-256: 6d19556461307ce14ae2b3e1d76707fe7ee17cdbd46caee1948ec0cfd50cc5b7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly advertises game hacks and generators, such as for Roblox. The primary URL, http://netcdn.tw/app/431946152/roblox-script-hack-game-hack, is flagged as a high-risk lure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/roblox-script-hack-game-hack PDF link annotation
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-hack-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-codes-cheats_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-hack-robux-with-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/roblox-bloxburg-house-builders-free_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dealcafe.me/uploaded_files/userfiles/files/coin-master-free-spins-no-survey_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_off00002dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD9 21848 bytes
SHA-256: 87785c25989af90b5deae8c87580e0e5dcd3e5b71ef6eb49e9da57b047dcb09c
font_01_sfnt_off00005dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DFD 19056 bytes
SHA-256: bb76e7a39623e8e346641af63eba4df40d7f195b132658733982612819f2f46a

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