Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fab3b9a6506f4ee…

MALICIOUS

PDF

43.6 KB Created: 2021-05-17 20:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 660ad7810fa46cb5d09852a661302b7f SHA-1: 20ad4634dfbc1e9d3d92acc11fff69ce9a7f2e92 SHA-256: 0fab3b9a6506f4eed6791513acb22055c152f8f7d9e2c2d624e5cf21483af045
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-spin-hack-apk-game-hack PDF link annotation
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/real-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://puskesmasdenbar2.denpasarkota.go.id/new/public/ckfinder/userfiles/files/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49B4 23552 bytes
SHA-256: bfc31a245fd9add8dff048e4684d118931f1b7ac26bfd7310e86b6225bf9507f
font_01_sfnt_off00007ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF4 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000088de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88DE 17892 bytes
SHA-256: f240daff11927ead54175dd0584966adfe4c567a63bac043ed3985d3f12dfc21

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