Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d2fb6ab6c8c650…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 05:23:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7176336dd486cfb301e095827313b96b SHA-1: 983cf5d436b470c79d60624b1eb0a2c209d37cec SHA-256: 53d2fb6ab6c8c650b2370db2fbf41f282f3ca09ad57ef97f3e77d03224d917fe
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document employs a common lure of game hacks and generators to trick users into clicking a link. It presents a fake CAPTCHA, a known social engineering tactic to coerce users into executing further actions. The primary link, http://netcdn.tw/app/431946152/hacks-for-roblox-prison-life-game-hack, likely leads to a malicious site or download. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect the user to a potentially harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/hacks-for-roblox-prison-life-game-hack PDF link annotation
    • http://sttlets.education/senayan//repository/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-join-anyone-on-roblox-without-hacking_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-obby-april-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-running-gamepass-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/five-nights-at-freddys-tycoon-on-roblox-free_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-cheats-for-iphone_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-robux-html-code-2021_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
font_00_sfnt_off0000330b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x330B 22128 bytes
SHA-256: 2f6665f1009810f969008bb79b0a4801dfd79228510287c9e73633ccafb85db3
font_01_sfnt_off0000642f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642F 19092 bytes
SHA-256: ef89b1d271636e764f722043ec5d09a3a98c04342f5f95fe8e2d5526ed958172

Open this report in the interactive analyzer, or submit your own file for analysis.