Malicious PDF — malware analysis report

Static analysis result for SHA-256 93cc8f8dc9cd09ec…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 19:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 94d263777f13e15f5099356e9ac8b46c SHA-1: abb71db5e1fdf29fc13aae3cc08a36421af0824b SHA-256: 93cc8f8dc9cd09ec9de7a3108d0de62dbed76b5889163a3a61a550125927fc34
142 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on domains associated with link farms and SEO spam. The document body and heuristic firings indicate a lure for game hacks and generators, specifically mentioning 'Coin Master' and 'Roblox'. The primary intent appears to be directing users to potentially malicious sites that may host scams or further malware. No scripts were extracted, but the PDF structure and embedded links suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-game-legitimate-hack-without-signing-up-or-shareing-game-hack PDF link annotation
    • http://www.readandenjoy.ae/userfiles/files/how-to-change-your-roblox-name-for-free-working-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/is-minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/google-sites-roblox-hack-online_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-package-codes-roblox-2021-november-17_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/wurst_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-roblox-gift-card-pins-2021-august_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/fly-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_off000031cd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CD 22344 bytes
SHA-256: c6e86f5ab82e6f93f3bfecfc4ccded30b943fac63ced42d7f363e1c386faf873
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 19128 bytes
SHA-256: 5eee594c08577a120cb39bf417ef6a2337e01377a49d37c7a4438bba62831708

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