Malicious PDF — malware analysis report

Static analysis result for SHA-256 1998d1e20df3ff02…

MALICIOUS

PDF

44.7 KB Created: 2021-06-09 07:26:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a0da95e2301d9c270d800b525d1f4d70 SHA-1: a474413c4ac96ea74d272b4ca9225771570ecafa SHA-256: 1998d1e20df3ff02d709f8586fe419f441bafc52103573bf2e9662164f984e88
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to pages offering game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure suggests a deceptive workflow. The document's primary purpose appears to be directing users to download potentially harmful files from external sources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-jailbreak-speed-hack-cheat-engine-game-hack
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-inspect-element-no-wait-2021_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-robux-2021-youtube_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-pocket-edition-free-download_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coin_GM406889139.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/hack-that-thing-robux-hack_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/robux-gratis-hack-2021_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-hack-download-jailbreak-noclip_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/blox-piece-roblox-hack_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-can-you-get-free-robux_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/minecraft-mods-download-free_GM479516143.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/free-halloween-costumes-on-roblox_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-4all-cool-hack-robux_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/tiktok-minecraft-hacks_GM479516143.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/roblox-multi-hack-2021_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/download-hack-roblox-cb-ro_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/como-hackear-roblox-para-tener-robux_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/super-nice-mml-hack-roblox_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/2-robux-for-free_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-hack-someone-in-roblox-2021_GM431946152.pdf
    • https://indonga.com.vn/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy-2021-on-ipad_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005102.bin
da22135c9daf180a70579cf3943c158615b77ad1d8637205d36d2e79190830ca
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5102 24116 bytes
font_01_sfnt_off000088ac.bin
7d57ec2b05e5070ca0645bb86fa0256c10176baf1f1085defbc63e1dc7ce6af5
pdf-font-stream PDF embedded font (sfnt) at offset 0x88AC 19376 bytes