Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83da90b5a5c076f…

MALICIOUS

PDF

42.1 KB Created: 2021-05-12 03:43:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a624a863ecb24e7b34efc616b0a21d6a SHA-1: e6f7f6e5dfc4d2dc005caeb7174601829bfde8c5 SHA-256: e83da90b5a5c076f681ed6b29517ccb8d1c3098c2b424d20a9e6fcabb98b4944
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9971

Heuristics 4

  • 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.
  • 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-mod-version-free-download-ios-game-hack PDF link annotation
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/robux-withdraw_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://stptonline.badungkab.go.id/assets/CKImages/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a53.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A53 24320 bytes
SHA-256: bd4d6b53d79ead1a02e5cafa5bb59a44dd732e5b84afd5801faff3f94f91c6de
font_01_sfnt_off000081bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BD 18424 bytes
SHA-256: e21c1a46e414e08f32ecd5b141a565b40ef5ebf0a551a42677bec20a6ad54cab

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