Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4166b86e595dab9…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 01:38:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4ad30e892f7d52c5ff14fb27bbb67933 SHA-1: ab841316d9375039ed059fb9b52b917199c8df04 SHA-256: a4166b86e595dab9607045609f9b50c0c129b81e72ac3c0ae719e8947f81dc52
122 Risk Score

Malware Insights

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

The PDF document contains lures for 'Free Robux' and game hacks, consistent with credential harvesting or malware distribution. It links to external URLs that likely host malicious content or phishing pages. The presence of MFA lures suggests an attempt to steal session tokens or bypass multi-factor authentication.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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-robux-android-game-hack PDF link annotation
    • https://duoledesign.com/image/data/files/cheat-codes-on-xbox-one-for-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-jailbreak-noclip-hack-download-in-description-patched_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-knife-cbro-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-marshmallow-head-in-roblox-2021-fr-free_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/my-boyfriend-is-cheating-on-me-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/create-free-roblox-shirts_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/wurst-commands_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/cheats-on-roblox-game_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/coin-master-daily-free-spins-link-facebook_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
font_00_sfnt_off00002f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F47 22628 bytes
SHA-256: b30f432227c59497622ea2e71d23ffdd573ace1ac9c165cdcf199aa2d8948a33
font_01_sfnt_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 19012 bytes
SHA-256: 2e478fc7b9ce0e70b8625047eb87de3eba01de88a50ec98befc019c81419eab9

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