Malicious PDF — malware analysis report

Static analysis result for SHA-256 88d5b1e15fc26fd6…

MALICIOUS

PDF

37.0 KB Created: 2021-07-05 10:47:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 26ed09527502c5a674606c22de64843c SHA-1: 2cd2354655455acd1561af6841dc3445c548fbe0 SHA-256: 88d5b1e15fc26fd662498f3e712469f29d24e40dca6e3ec234669b52880dc4e6
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/431946152/free-roblox-card-game-hack PDF link annotation
    • http://www.pustaka.pn-calang.go.id/repository/pokemon-go-free-and-switch-connect_GM1094591345.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-free-gamepasses-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/tiktok-free-like-website_GM835599320.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/como-ser-hacker-en-roblox-mad-city_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-da-hood-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-to-get-money-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-do-u-undo-someone-hacking-ur-roblox-acc_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-fly-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/seven-v2-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/beyond-roblox-speed-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/how-do-i-hack-a-roblox-user_GM431946152.pdfIn PDF document text
    • http://pustaka.pn-calang.go.id/repository/get-free-robux-by-entering-thid-birthday_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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
font_00_sfnt_off00003c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C28 21996 bytes
SHA-256: 9103c0adbc7e583f486ad7cfef5d5d062b047c3f2458b0fffff8d019c4bf210b
font_01_sfnt_off00006c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C87 18824 bytes
SHA-256: 43c37c5681e12f98f0ff91a02fcc5c5f43ff7a205fa731b1220fcdc88032b5a3

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