Malicious PDF — malware analysis report

Static analysis result for SHA-256 257559f6ba1d59ff…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 22:32:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b98ad118ef02aa747b8a62ebc1b277ba SHA-1: aebaa000d6b9c19987eb591fab5f74c22813149d SHA-256: 257559f6ba1d59ff42a10c216d11a734d9d9dc9ed889636c859fbb35f414b68b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a high-severity heuristic firing for a game hack lure, directing users to a suspicious URL. The document body also explicitly contains this URL, reinforcing the lure. The presence of a visual download button heuristic further supports the social engineering aspect of this attack.

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/406889139/apk-coin-master-hack-game-hack PDF link annotation
    • http://www.visionledindia.com/uploaded_files/userfiles/files/newo-icu-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-world-free-to-use_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/roblox-free-cool-clothes_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/pumpkin-guts-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/8bp-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.visionledindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-codes-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
stream_002_off00003409.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3409 22712 bytes
SHA-256: 4ef3ffacf0f1894ba17b805dd546eb4c1d5365e0745bd897e0c04abd714ca3ac
font_01_sfnt_off000066d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66D0 18180 bytes
SHA-256: 02092733737bc01a074e4b086c3b9816d726ecd0acc13f0522c2cc892addd8db

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