Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d94af0cb71eafa…

MALICIOUS

PDF

44.5 KB Created: 2021-05-11 01:37:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5f43189baffdd1c3b88dee1396a825e9 SHA-1: 54afade01aa7aeec4ef3f5d0a679d309f997a8e1 SHA-256: 56d94af0cb71eafafc7130586845acc922de6b6ebad7f9f7347158335e904fed
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that mimics a lure for free in-game currency and cheats for games like Minecraft and Roblox. The presence of a PDF link farm heuristic and multiple external URIs suggests a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/how-to-get-free-minecoins-in-minecraft-game-hack
    • http://ekaterinakorneva.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-earn-free-spin-in-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-create-group-in-coin-master-free-spins_GM406889139.pdf
    • http://ekaterinakorneva.com/images/roblox-free-clothes-hack_GM431946152.pdf
    • http://ekaterinakorneva.com/images/www-robux_GM431946152.pdf
    • http://ekaterinakorneva.com/images/coin-master-spin-link-2021_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://ekaterinakorneva.com/images/free-spins-coin-master-cheat_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://ekaterinakorneva.com/images/rbl-gg-free-robux_GM431946152.pdf
    • http://ekaterinakorneva.com/images/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • http://ekaterinakorneva.com/images/free-robux-on-iphone_GM431946152.pdf
    • http://ekaterinakorneva.com/images/free-minecraft-website_GM479516143.pdf
    • http://ekaterinakorneva.com/images/coin-master-admin-free-spins_GM406889139.pdf
    • http://ekaterinakorneva.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-rewards-free-spins_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdf
    • http://ekaterinakorneva.com/images/free-robux-site_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bfa.bin
8dfd7bd8f43399ae90ef883aa2919031f6802ce1b1fa159b8860258f0da3d827		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFA 24588 bytes
font_01_sfnt_off00008305.bin
96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 2820 bytes
font_02_sfnt_off00008ca5.bin
81b1d154aec9bd98ecdb2ab8ecc7cbe93e1e8bf82edf60babb6ca5717914fb66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA5 17872 bytes

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