Malicious PDF — malware analysis report

Static analysis result for SHA-256 da1cc2b3f3499641…

MALICIOUS

PDF

34.3 KB Created: 2021-07-08 11:48:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e9f8c42b2829cb43b6ce006fccb4adf9 SHA-1: 27bddf91e3c63ac6d4f9e974e3fef49f36a3fc97 SHA-256: da1cc2b3f3499641ea954295e6ad956c310cb519dcb2f4bab74c57e195fed778
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/431946152/roblox-free-robux-website-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-october-28-2021-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/wwe-backpack-roblox-free_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/pokemon-go-free-license-key_GM1094591345.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-do-you-get-money-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/cool-free-things-on-the-catalog-for-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/what-happens-if-you-go-on-a-free-robux-website_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.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_off00002f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F45 22256 bytes
SHA-256: 73b0157ca58dd3d19acea298ea8ff41bee8ef4db4f4fa4a842ca2b92b258f71e
font_01_sfnt_off0000607f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x607F 19212 bytes
SHA-256: 4b1e8e9c88347b3f29ea09d9c43ed0e523ec5f5ba27152f0fbcfe198ff1f6a17

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