Malicious PDF — malware analysis report

Static analysis result for SHA-256 b284182eae431b4e…

MALICIOUS

PDF

32.4 KB Created: 2021-07-04 08:13:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 12bf2e595d706a4121f46e04bfcfcb1c SHA-1: 4f147f6462785df3d298eba9e22767fb61b80b7a SHA-256: b284182eae431b4ee84204757730b7822786ec528a0381f4a750a518d85f9a15
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9824

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/431946152/mistplay-robux-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-hack-robux-4_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-solobird-guitar-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-expolit-that-kills-others_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-things-that-cost-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-bc-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/super-sayian-hair-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/robux-best_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000028ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EA 21760 bytes
SHA-256: e7d4ebd028c3e2a67ccde6f23ce70cec3dc30ff14f22faa6656a0d991e2d92b7
font_01_sfnt_off000058ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58BA 19400 bytes
SHA-256: 7e97903016aa4e609ba99714bd7fa34905edabc8e1c38ff4a6efcd64954d6305

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