Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27f0527b12c5e7d…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 22:23:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f15f74dbd39ea73d9b9e11c8609e45e0 SHA-1: aa6fe2de257f4e1ef1d65d451e6cd288acb12ccf SHA-256: d27f0527b12c5e7ddde46f984f8722282b60c20784438b1b1d5a667c96cc2516
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a call-to-action phrase, strongly suggesting a lure for users to download or access potentially malicious content. The ML classifier also flagged this PDF as malicious. The primary IOC is the URL http://netcdn.co/app/431946152/free-accounts-for-work-scam-roblox-game-hack, which appears to be the intended destination for the scam.

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.co/app/431946152/free-accounts-for-work-scam-roblox-game-hack
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-real-free-spins_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-robux-generator_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-earn-robux_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-free-modeler_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-app_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-group_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-firebird-card-free_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/i-want-free-robux_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-working_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/pop-slots-free-vegas-casino-slots-machine-game-coin-master_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-verify_GM431946152.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/can-pokemon-go-free-account_GM1094591345.pdf
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-player-radar-hack-site-https-v3rmillionnet_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000333a.bin
872a8dd11b884c7b48c4f2f23b4efb1262305c89a9ff5d75de47000967e1017b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x333A 21680 bytes
font_01_sfnt_off00006309.bin
65ef7e24083cb40419a75b05d6ecdc047ff5467554375c231a552bbc8bb327e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 19520 bytes

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