Malicious PDF — malware analysis report

Static analysis result for SHA-256 42e42fa614195dcd…

MALICIOUS

PDF

33.8 KB Created: 2021-07-07 03:39:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a54638197b419523c03881dc3ce98a4e SHA-1: f19c37aecccafab45a2b5b6aefbb78ff2df660d5 SHA-256: 42e42fa614195dcdca47d05ac41860c7988362409247e2dbeba07c3a779a0846
102 Risk Score

Malware Insights

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

This PDF file exhibits malicious behavior through its extensive use of external links, many of which point to game-related hacks and cheats. The presence of a "download" button lure further suggests an attempt to trick users into downloading malicious payloads. The ML classifier strongly indicated maliciousness, and the PDF structure itself contains a large number of external links, indicating a potential link farm or redirection scheme.

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/479516143/minecraft-java-code-free-game-hack
    • https://www.iseas.com/uploaded_files/userfiles/files/hack-jailbreak-roblox-police_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-change-your-name-on-roblox-for-free_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-stop-attack-hack_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-online-robux-hack-no-survey_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-adopt-me-money-hack-2021-script_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-iphone_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-free-school_GM479516143.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-accounts-november-2021_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/best-free-weapon-mad-city-roblox_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-roblox-accounts-generator_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/roblox-strucid-aimbot-hack-2021-august_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-game-android-free-download_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/fornight-in-roblox-free_GM431946152.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/free-coin-spin-coin-master_GM406889139.pdf
    • https://www.iseas.com/uploaded_files/userfiles/files/minecraft-hacks_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003177.bin
de0d13426ffa8b3ad5d35a4f429a58258f2be480b1342a4a4e053deb959d03e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x3177 21824 bytes
font_01_sfnt_off000060d1.bin
16671fd22d5178f4ee91bd1dac9de86b871bb3f71416cabb6af28097c9991cf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 18452 bytes