Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced8d3c1e6995af7…

MALICIOUS

PDF

32.8 KB Created: 2021-06-19 16:03:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4b3877100a10bfeb0e3c343cb5feb836 SHA-1: a9926ffa63f23af636cbfa8457276ad3a96d3626 SHA-256: ced8d3c1e6995af72659b23fbc55007d5d6eba69904d73084312c123c66eeb8e
102 Risk Score

Malware Insights

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

The PDF document contains numerous links disguised as download opportunities for popular games and virtual currency, a common lure for phishing and scam operations. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the ML classifier strongly suggests malicious intent. The primary IOC is the URL http://netcdn.co/app/431946152/free-tix-and-robux-no-download-game-hack, which is presented as the main download destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-tix-and-robux-no-download-game-hack
    • http://pa-bengkulukota.go.id/images/minecraft-free-play-no-download_GM479516143.pdf
    • http://pa-bengkulukota.go.id/images/cm-free-spin-link-today_GM406889139.pdf
    • http://pa-bengkulukota.go.id/images/robuxian-com-free-robux-code-generator-roblox-code-generator_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/coin-master-new-cards-hack_GM406889139.pdf
    • http://pa-bengkulukota.go.id/images/how-to-hack-coin-master-ios-2021_GM406889139.pdf
    • http://pa-bengkulukota.go.id/images/how-to-change-roblox-username-for-free-2021_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://pa-bengkulukota.go.id/images/master-coin-hack-apk_GM406889139.pdf
    • http://pa-bengkulukota.go.id/images/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/free-robux-hack-2021_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/working-robux-hack-without-a-human-verification_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/download-to-free-admin-in-roblox_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/roblox-jailbreak-2021-btools-hack_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/is-tiktok-free-app_GM835599320.pdf
    • http://pa-bengkulukota.go.id/images/no-robux_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/minecraft-story-mode-free_GM479516143.pdf
    • http://pa-bengkulukota.go.id/images/tiktok-free-online_GM835599320.pdf
    • http://pa-bengkulukota.go.id/images/free-tiktok-accounts_GM835599320.pdf
    • http://pa-bengkulukota.go.id/images/infiite-jump-hack-for-roblox_GM431946152.pdf
    • http://pa-bengkulukota.go.id/images/cheats-coin-master-free-spins-and-news_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002a82.bin
3a1e888fdaac8f2ecabb66be82897c0199ca16e9fba39fe723343e988e416a21
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A82 21720 bytes
font_01_sfnt_off00005a53.bin
2e6004805a97f49dfdf65cd164e07f9d783a07b8acc7e902b813652ee8ef920b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A53 19416 bytes