Malicious PDF — malware analysis report

Static analysis result for SHA-256 f716ab03fb64d33f…

MALICIOUS

PDF

34.8 KB Created: 2021-07-07 15:37:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ef94496d75bd54b50bf6a556621590fb SHA-1: 9702b4b2c946ac13fecd4d76a0ddb7f8642dfe34 SHA-256: f716ab03fb64d33f39682e37658f3a42622b3686d8c5e6ec484cc985c51f6c40
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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-mod-game-download-game-hack PDF link annotation
    • https://tnupacktour.com.tw/image/data/files/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/get-free-robux-now-free-robux-generator-com_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/rewards-robux_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-vip-server-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/pokemon-go-free-money_GM1094591345.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-speed-hack-in-roblox-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-hack-pokedigerone-in-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/synapse-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-hack-jailbreak-on-roblox_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/how-to-get-free-robux-on-a-group_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/2021-free-robux-windows-81_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/getrobux-ninja_GM431946152.pdfIn PDF document text
    • https://tnupacktour.com.tw/image/data/files/coin-master-spin-and-coins-free_GM406889139.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_002_off00003218.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3218 22356 bytes
SHA-256: 60f971436a8473f2d5c67a811a115ff6fb2a6dfb9fac3dd3694475043b3d3986
font_01_sfnt_off000063a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A7 18844 bytes
SHA-256: 0a327d38817765eb631c0913c186b555a890e4927130425a28edf4781abaaa94

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