Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5e648d0be2aed2…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 03:17:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 887e535df31c1dde29e758dba12bda06 SHA-1: c36459eb04baa491641296d2a9512ab3a272c16c SHA-256: 9b5e648d0be2aed211c6e6d8e61821f7815b2899cf49f01bde3a40fd38146747
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to game-related content, suggesting a lure for users to download potentially malicious files. The ML classifier strongly indicated maliciousness, and the presence of a direct download URL further supports this. No scripts were extracted, but the overall structure and link farm indicate a phishing or malware distribution attempt.

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-game-hack
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-game-download-free_GM406889139.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/prestonplayz-someone-hacked-my-roblox-account_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/free-robux-obby-2021_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-free-play-no-download-on-ipad_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-free-play-online-no-download_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/earn-free-spins-for-coin-master_GM406889139.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/free-spins-coin-master-app_GM406889139.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/do-things-from-hack-week-ever-make-it-into-roblox_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/roblox-verification_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/robux-websites-2021_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/pokemon-go-free-legendary-hack_GM1094591345.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/microsoft-bing-free-robux_GM431946152.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/60-free-spins-on-coin-master_GM406889139.pdf
    • https://klp.com.tr/inc/uploads/userfiles/files/gain-blox-2021-free-robux-inspect_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003029.bin
aa38383631bbe68a88f092d388a193ed03ace243ed944cf5a89cc827648926ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x3029 22200 bytes
font_01_sfnt_off000060bb.bin
18153eb78e52d10f573a403757bf08b8b042ff0dae7dd3b4cc440df27f37a65e
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 17856 bytes