Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b0c3933b72ab13…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 19:49:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 36d8126337f31f778e4f4f5e08edc389 SHA-1: 5551cdc60f18091060b2f3845358727d2386e9be SHA-256: 30b0c3933b72ab13d31cf35d92a4d5bbbdd6cda31aae8ef021cc39d506222f4a
142 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game-related cheats or mods. The presence of a direct link to 'xray-mod-minecraft-1.14-game-hack' and the 'ClickFix' heuristic indicate a social engineering attempt to trick users into downloading malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/xray-mod-minecraft-1.14-game-hack PDF link annotation
    • http://sudamericarural.org/images/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/is-minecraft-earth-free_GM479516143.pdfIn PDF document text
    • http://sudamericarural.org/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://sudamericarural.org/images/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://sudamericarural.org/images/roblox-hack-unlimited-robux_GM431946152.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_off00004b49.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B49 26600 bytes
SHA-256: 9e8fa075650cc4726aeb358e2f78309d156bd8a6bd2b55416efa62ebf3bd1550
font_01_sfnt_off000087a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A4 18528 bytes
SHA-256: 27dc6fe7fa9d284304e2d20a0fdf89d35739861aca7d0ce8ff0497fb2d5c6676

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