Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5941536bd0ae4f…

MALICIOUS

PDF

46.2 KB Created: 2021-06-09 17:03:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 09fc53819b55ba3e553178b103bef80e SHA-1: 04764526295ab20a8bb2ed1ca2add2f43f691c11 SHA-256: 4b5941536bd0ae4f7c01687ff3cdc2f3ed6e6672b5b1e556479409b7f1916c5e
102 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a malicious SEO link farm, containing numerous links to other PDF documents hosted on external domains. The document body and extracted URLs suggest a lure for game cheats and hacks, aiming to trick users into downloading further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/cheats-for-egg-farm-simulator-roblox-game-hack
    • http://inextpresident.com/images/roblox-prison-life-hack_GM431946152.pdf
    • http://inextpresident.com/images/picture-roblox_GM431946152.pdf
    • http://inextpresident.com/images/earn-robux-com_GM431946152.pdf
    • http://inextpresident.com/images/how-to-get-robux-easy_GM431946152.pdf
    • http://inextpresident.com/images/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-hack-online-link_GM406889139.pdf
    • http://inextpresident.com/images/how-to-use-cheat-engine-on-roblox-2021_GM431946152.pdf
    • http://inextpresident.com/images/how-to-hack-robux-with-cheat-engine-63-2021_GM431946152.pdf
    • http://inextpresident.com/images/roblox-zone-free-robux_GM431946152.pdf
    • http://inextpresident.com/images/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://inextpresident.com/images/free-robux-scams_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-free-spins-cheat_GM406889139.pdf
    • http://inextpresident.com/images/robux-hack-no-buying-apps_GM431946152.pdf
    • http://inextpresident.com/images/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • http://inextpresident.com/images/how-to-make-a-minecraft-java-server-for-free_GM479516143.pdf
    • http://inextpresident.com/images/free-coin-master-coins_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • http://inextpresident.com/images/minecraft-realms-free-codes_GM479516143.pdf
    • http://inextpresident.com/images/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://inextpresident.com/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053a3.bin
1ed215312c3f60b2184d783c64e35fb31eeac02a54427783d3a093d003d0c185
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53A3 25868 bytes
font_01_sfnt_off00008f4b.bin
f5738bed47c08abcda1c805959b3a3827e5ec536892606503e9b64af953f95a9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4B 19256 bytes