Malicious PDF — malware analysis report

Static analysis result for SHA-256 32473beb863784db…

MALICIOUS

PDF

36.1 KB Created: 2021-07-03 10:25:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f8de1852ac222aedb47319fb46dda1de SHA-1: b0d59c129868bb16b588b4d4e65992a7d1afc9ce SHA-256: 32473beb863784db311d7c1f47cfeda5e505ae8622c14b99775e5b4861b208b4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack lure, linking to a suspicious URL. The document body, though partially garbled, contains text related to 'Coin Master Daily Free Spins Link' and the same suspicious URL. This indicates a phishing attempt to trick users into visiting a malicious site.

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.co/app/406889139/coin-master-daily-free-spins-link-game-hack PDF link annotation
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/roblox-free-robux-generator-no-survey-and-humen_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/dget-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-can-i-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-roblox-codes-giveaway_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/robloxhackcomo-tener-roboux-gratis-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-robux-by-doing-this_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-rbxrewards_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/find-the-code-and-get-400-million-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/give-me-robux-now_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
font_00_sfnt_off0000358b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x358B 22904 bytes
SHA-256: 6641e5fe1502766f0e28e2df0e4610134168d0dbd95d722789dcd68e32a4fd0a
font_01_sfnt_off000068ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FF 18768 bytes
SHA-256: 989ac8744b1238afa99b88b7bb3fb2df9d299a986309a52cf516f5921eb03fc0

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