Malicious PDF — malware analysis report

Static analysis result for SHA-256 665fd39fe660438c…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 10:18:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62579d3b93fb467d69b60d58dd2a834a SHA-1: 099509e569531d40db5aa91e6ba1ca63ec66d94a SHA-256: 665fd39fe660438cf784656e57bd5b6dc58cefed422196b742ac61f68e9ed5f5
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 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-hack-without-verification-2021-game-hack PDF link annotation
    • http://stitqi.ac.id/website//repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/robux-money_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/getting-free-robux-on-a-website_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/guuudd-info-for-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/www-robux-com_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-mml-admin-hack-script_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-how-to-get-clothes-for-free-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-and-tix-no-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/games-that-give-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_off000031bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BD 23092 bytes
SHA-256: 3b6c76c1aad4dacb81406100fe6dde2ed1e818b807c09433ed745e98c0d58519
font_01_sfnt_off00006566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6566 19044 bytes
SHA-256: bc164ad6cfe60f57cf308bf587fcf39d6d442c5b14af35d4986789bcc521b71c

Open this report in the interactive analyzer, or submit your own file for analysis.