Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb69aaef48fd09cd…

MALICIOUS

PDF

36.3 KB Created: 2021-07-04 09:08:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 274d5cf221cfccf1bde0e97928b79402 SHA-1: b3df9f0b0394c6cc47a616c27603ae1c498326a7 SHA-256: bb69aaef48fd09cdde30a818e8bdd928e02245b12050a55112c8948cb513b124
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-risk heuristic firing for a game hack redirect lure, pointing to the URL http://netcdn.tw/app/406889139/free-spins-coin-master-2021-app-game-hack. This URL is embedded within the document body and also identified as an external URI. The ML classifier also flagged this PDF as malicious with high confidence. The document's content and embedded links suggest a social engineering attempt to trick users into visiting a potentially 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.tw/app/406889139/free-spins-coin-master-2021-app-game-hack PDF link annotation
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-2021-no-offers_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/queen-i-want-to-break-free-roblox-di_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-hack-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/super-speed-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-cheat-engine-bypass-march-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-roblox-shirt-assets_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-hacking-script-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-admin-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-code-generator-no-download-no-survey_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-super-bomb-survival-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-face-outfit-hacks_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-bgs-cheats-to-get-kraken_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-hack-a-account-on-roblox-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_off000034ea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EA 23532 bytes
SHA-256: 60a77529d0a7eb7544d9c80f42f05b10d879da5f4ac4356c35e25169158a6a66
font_01_sfnt_off00006a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 18576 bytes
SHA-256: 15a675c2e57ed79e3df4794bcfdf733c83ffccf7533f1288849b01a630512951

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