Malicious PDF — malware analysis report

Static analysis result for SHA-256 c983a8d905bd2068…

MALICIOUS

PDF

49.1 KB Created: 2021-06-06 23:26:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 805933fea1c06c38bce75a9387473dd5 SHA-1: 1f3e99330c6fb92579b3a6f713372cbde9a5a2a3 SHA-256: c983a8d905bd206829d04419e18d76f67e475e0972fe0fe9b0aa3c73b8e4dfb3
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure for game-related hacks and free accounts, directing users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the embedded URL is a high-risk indicator. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/free-jailbreak-account-roblox-game-hack PDF link annotation
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-bc-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-codes-2021-not-used-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-download-game-roblox-for-pc_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-hack-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/how-to-hack-in-roblox-fortnite_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/roblox-cheat-engine-fly-hack_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/robux-hack-human-verification_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/roblox-mac-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.softwaretestingnews.co.uk/wp-content/uploads/fsqm-files/free-robux-the-easiest-way_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000521d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521D 25824 bytes
SHA-256: 367e4c54e5c406a48f8f89ddaf55c8cf623b7f891fe9a5898ffc6615b63cf97b
font_01_sfnt_off00008e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6E 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B80 18876 bytes
SHA-256: 545416a487f5f0d5f6cc8b9ca7a0b90cac4218a95a9bb4e636d8049e291c3f28

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