Malicious PDF — malware analysis report

Static analysis result for SHA-256 1472a3243e722915…

MALICIOUS

PDF

47.7 KB Created: 2021-06-02 10:15:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 16ba053a43b15b864be969d041de40f2 SHA-1: 8b06f78c05e4f9716639bff11604e32821db4270 SHA-256: 1472a3243e7229151513c906a5525bc3dc276cf66dd794fddd7bb28d699f98fb
142 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which are structured as SEO-style links pointing to other PDF documents. The presence of a fake CAPTCHA heuristic indicates a likely attempt to trick the user into interacting with the document, potentially leading to the download of a second-stage payload via the embedded URLs. No scripts were extracted, but the overall structure and heuristics suggest a malicious document designed for user-driven payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.xyz/app/431946152/how-to-steal-roblox-shirts-free-bc-game-hack PDF link annotation
    • http://iacfhouston.com/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://iacfhouston.com/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://iacfhouston.com/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://iacfhouston.com/images/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/roblox-install-free_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://iacfhouston.com/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://iacfhouston.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005076.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5076 26576 bytes
SHA-256: cd409a1a2dd6246555718199bebc6a6fc4b37a123cda49d79529fa3971d6c521
font_01_sfnt_off00008c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C91 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off0000968d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x968D 18732 bytes
SHA-256: cad50cc4f80a335b3b0809c6041c3a28b86c81071796a6b2347e13b1bccb28bf

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