Malicious PDF — malware analysis report

Static analysis result for SHA-256 41b9628269da12f6…

MALICIOUS

PDF

34.6 KB Created: 2021-06-29 21:00:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dbf3361ba0e09aea2cbee990a848a013 SHA-1: a8277dae17f461f03078e9737a870e7cdf1d0f91 SHA-256: 41b9628269da12f62c439bbc8c814a7fc0029209fe8aad1e338eef5e8c0c041f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous URLs and a call-to-action phrase, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs focus on 'free Robux' for Roblox, indicating a lure to trick users into downloading further malicious content or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/431946152/how-do-you-get-free-robux-on-roblox-2021-game-hack PDF link annotation
    • http://183.91.70.11/repository/free-robux-games-that-actually-work_GM431946152.pdfPDF link annotation
    • http://183.91.70.11/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-robux-hack-no-download-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/free-robux-at-freerobuxeu_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-the-free-prize-giveaway-obby_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-theme-park-tycoon-2-cheat-codes_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-cheat-codes-builders-club_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/code-hacks-for-roblox_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/egg-farm-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://183.91.70.11/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-hack-any-roblox-games-using-cheat-engine_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://183.91.70.11/repository/roblox-cheat-engine-robux-download_GM431946152.pdfIn PDF document text
    • http://183.91.70.11/repository/how-to-get-free-robux-2-15-2021_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_off00002eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAC 22180 bytes
SHA-256: fc2a1f7b1f959656a0f520444c5777ceed4c0c218ed68488bd32a9af159dfb22
font_01_sfnt_off00005fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCC 19792 bytes
SHA-256: c279fe3fa07008dd1d3d2513499cf5e2f99bc8ed6bd119a5d4b58ca3f5d2942e

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