Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e1bce3521debb7…

MALICIOUS

PDF

45.5 KB Created: 2021-05-16 21:24:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 719057bc6edd8fe6d29b6da97ef777b5 SHA-1: da2ce16366ecb6c28cbe9cb24a276e942d29ddf3 SHA-256: 12e1bce3521debb72f91fd3624205b140ae09418629f9fac1a5fd98d71387813
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a link farm, directing users to download-related content for games like Minecraft and Roblox. The ML classifier strongly indicated maliciousness, and the presence of external URIs suggests the document is designed to redirect users to external sites for further action, likely to download malware. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/479516143/minecraft-free-trial-game-hack PDF link annotation
    • http://www.visiblefilm.com/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://www.visiblefilm.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-hack-tuts_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.visiblefilm.com/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.visiblefilm.com/images/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://freegiftcodes.euIn PDF document text
    • https://sigmaclient.info#2In PDF document text
    • https://flux.today#3In 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_003_off000049b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B1 27564 bytes
SHA-256: 92667ba9d523c045cdd375a77dbf79bef2e477125e8626a0fe41264ea786679b
font_01_sfnt_off000087ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BA 2840 bytes
SHA-256: 787e0768241fb57660bcc9c7f726cf687277c463cdf8c586c4782ee9d03c3606
font_02_sfnt_off00009178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9178 17644 bytes
SHA-256: eaa999d9fcd0e41c3411a6787ff304b3b9a642a81f97c4ae06503d53e3265cce

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