Malicious PDF — malware analysis report

Static analysis result for SHA-256 380134c8336b0593…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 01:23:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 316c0d9343f67a29504c100bf265e6a4 SHA-1: a97f442e671b5e2420ccab3272df34ada42d2bcf SHA-256: 380134c8336b059344eed1f2ccfcc5aabcbb62cac23c059de619a26b6f3fc81b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are SEO-optimized and point to game-related hacks and downloads. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of numerous malicious-looking URLs and the SEO link farm heuristic strongly suggest an attempt to redirect users to malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/cool-math-games-roblox-free-download-game-hack PDF link annotation
    • http://jbm-constructions.com/images/pokemon-go-free-apk-download_GM1094591345.pdfIn PDF document text
    • http://jbm-constructions.com/images/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://jbm-constructions.com/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/free-robux-no-survey-no-download-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/how-to-get-free-robux-no-website-2021_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/free-robux-to-vbucks-translator_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://jbm-constructions.com/images/multiple-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • http://jbm-constructions.com/images/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/roblox-jailbreak-hack-client-redboy_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/get-robux-today_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/coins-master_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://jbm-constructions.com/images/coin-master-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://jbm-constructions.com/images/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://jbm-constructions.com/images/lastrick-com-coin-master-hack_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
font_00_sfnt_off00002f4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4D 21744 bytes
SHA-256: 970b9c00f8482231250b30d5fbe57a60a1eefe35c482078bfeb489a3d57ee1c3
font_01_sfnt_off00005eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB7 19696 bytes
SHA-256: ec0ec9d7a7d2c5df4ef10e339cc209984e6d89193900a3260c9b1de6f671c5be

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