Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c09b19a74e008d0…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 04:01:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2f250a164ab4b0a7630de17eea74c72b SHA-1: c58ad48c7d48e7f52439e821650f5482f1816f56 SHA-256: 6c09b19a74e008d0edd70a127c6151d2f82b3654e8d59eafe699dd45491b7ae6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to websites offering 'free Robux' or game hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to free Robux and game hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/free-robux-codes-2021-game-hack PDF link annotation
    • http://jasperfirstumc.com/images/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/best-tricks-co-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/roblox-free-models_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://jasperfirstumc.com/images/free-spin-coin-master-ios_GM406889139.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
stream_003_off000047bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47BD 25368 bytes
SHA-256: 759742013adebee7f80e012e3ca7722dae915272d397e8430f0f9b4c7c882ed1
font_01_sfnt_off00008293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8293 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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