Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b74f1e21958b5a8…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 00:49:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc6fbf1a1f9147ece48afcc960e1b56a SHA-1: 8fb38e0412886a7f6a20ee2f8210cd4ca2191848 SHA-256: 1b74f1e21958b5a806b6e7c8e9fd1e00ca7236d611f6c472caa610a1e63cb051
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 0.9980

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-hack-2021-game-hack PDF link annotation
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/pubg-uc-and-bc-generator_GM1330123889.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/cheat-engine-roblox-shut-down_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/hacker-roblox-picture_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/easy-hack-method-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/is-roblox-download-free_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-coloring-pages-printable-free_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/free-hacking-admin-commands-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/roblox-hack-minig-simulator-v3rmillion_GM431946152.pdfIn PDF document text
    • https://www.dahu-villa.com.tw/upload/files/claim-free-robux_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
font_00_sfnt_off00002f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7D 23440 bytes
SHA-256: 7065171fec310e4f36d9cf666cf0b27610d1de5db3ab1d298c837b637b20beb4
font_01_sfnt_off0000647d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 18748 bytes
SHA-256: 06bff1013f90e97ddb143b22f706740fea58d84013a71a1f61bcbcc410d416bf