Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b18d770c391c907…

MALICIOUS

PDF

31.9 KB Created: 2021-07-19 12:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 637072e5867d0ed6980e148c704a742e SHA-1: 4957ef5259cf9c55bd3a3d5ae5e1ea2538a314e5 SHA-256: 7b18d770c391c907095933279ed426ac6dcdb78831458f8e7a6056816459bbd3
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 0.9936

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/free-robux-hacker-us-game-hack PDF link annotation
    • https://www.tiancom.com.tw/upload/files/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-daily-free-spins-link_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_off00002837.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2837 22288 bytes
SHA-256: 6054d0e544802a79c40495da505068fc43fb529e9b94646df31836e83d6ca9ee
font_01_sfnt_off0000599f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599F 18600 bytes
SHA-256: be32b0f906764c1f2317decc7ac5a24a5975e1ace61028a3a9703984df87bb8b

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