Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c7d43830a17287…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 06:10:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6753538732b444a57f075dfc910f24bb SHA-1: abc4b4254480aeddecbfcc7a613a5f47491ebed4 SHA-256: f6c7d43830a172872cbab66ea7d7cbee4b7c11b1874c383510c24b2bbf2c6ea9
82 Risk Score

Malware Insights

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

The PDF contains a prominent link to a 'free generator / game hack' lure, which is a common tactic for distributing malware or conducting phishing. The document body and extracted URLs reinforce this theme, pointing towards game-related exploits and currency generators. No scripts were extracted from this sample, but the embedded link is highly suspicious and likely leads to a malicious payload or phishing page.

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.co/app/431946152/roblox-inspect-element-free-robux-game-hack PDF link annotation
    • https://delsys.com.tw/image/data/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-andrbirds-head-roblox_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-kozak_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/hack-coin-master-for-iphone_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-roblox-money_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-a_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-rixty-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/roblox-free-admin-script-pastebin_GM431946152.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/pokemon-go-free-evolve-with-trade_GM1094591345.pdfIn PDF document text
    • https://delsys.com.tw/image/data/files/free-game-pack-with-google-play-coin-master_GM406889139.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_off00002eca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECA 22648 bytes
SHA-256: 8aed4ecba933064a644f7eb317db941ec6e828cdcc55c9117a9eeb66e644ba29
font_01_sfnt_off00006164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 19332 bytes
SHA-256: ee82a16f1aa32b0a6a12492a60a4f7fd4d7c591a3228a69dd3b4e0200d48383b

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