Malicious PDF — malware analysis report

Static analysis result for SHA-256 efee506412f8e37a…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 16:47:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 855b7754ce4d7aa7d35766e0cb428161 SHA-1: ab3fcacd5d0f6a219416c9a9d5c6c65f873fb4ab SHA-256: efee506412f8e37a63ce53902cc7afb6fc3b55095809ae39852288548836ef5e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/minecraft-download-free-download-game-hack PDF link annotation
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-roblox-money-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-phantom-forces-coins-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-javascript-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/roblox-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/roblox-cash-hack_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-a-free-roblox-account-with-robux_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/como-hackear-uma-conta-do-roblox_GM431946152.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-robux-no-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vermaagri.com/uploaded_files/userfiles/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://vermaagri.com/uploaded_files/userfiles/files/codes-how-to-get-free-robux_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_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 22020 bytes
SHA-256: b995e84ac77d1d5ac643c0c5e9853012f85c589feb67022fc9e66273f90c7b13
font_01_sfnt_off00005f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7B 18576 bytes
SHA-256: 40aa17af32215803f1fba4a6734646ab30a634826190d5834ae8dd781bed6596

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