Malicious PDF — malware analysis report

Static analysis result for SHA-256 eccd1a160484786c…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 17:27:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 137a790859e798a0864feafadaf407f5 SHA-1: dd4edca83b69d62c96dd16bb93e11b4ca039a64f SHA-256: eccd1a160484786c08d5886e0e95e54a510d76d7ad2dd7e571f1870d4572354c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was identified as malicious by an ML classifier and contains numerous external links, many of which are disguised as downloadable game hacks. The document body explicitly mentions 'Coin Master Hack' and includes URLs pointing to sites offering 'free spins' and 'free robux', indicating a lure for potentially unwanted or malicious downloads. The presence of a mass external PDF link farm suggests an attempt to manipulate search engine results or distribute further malicious content.

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.tw/app/406889139/coin-master-hack-to-get-free-spins-game-hack
    • https://sunnygarden.com.tw/image/data/files/how-to-code-free-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-picture_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/hack-roblox-mod-apk-unlimited-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-get-java-minecraft-free_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-just-click_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/optifine-minecraft-pe_GM479516143.pdf
    • https://sunnygarden.com.tw/image/data/files/spin-hack-for-coin-master_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-builders-club-free_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-free-stuff_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-become-a-speed-hacker-in-roblox_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/bacon-do-you-want-free-robux-buur_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-use-winrar-for-hacks-roblox_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/roblox-jailbreak-invisible-hack_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-links-for-free-spins_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-real-hack_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://sunnygarden.com.tw/image/data/files/free-robux-with-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032a1.bin
c5bc941add5d626b9cc4d9c9e19edcf4a9ebefbf9cd146e3c0691f80b73be9d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x32A1 22548 bytes
font_01_sfnt_off000064ca.bin
fa0c6498e8cb3df25ce213dd730013f2a18bc0fb837afce4bed4a0fe00262337
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CA 18344 bytes