Malicious PDF — malware analysis report

Static analysis result for SHA-256 458d94f97ea2c77d…

MALICIOUS

PDF

52.2 KB Created: 2021-06-11 05:09:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9dfc1d9dc5058470b1ed99182863798a SHA-1: 957c2cf8668c5dfad5414bf5d9e3d13ab203875a SHA-256: 458d94f97ea2c77dc8a4e35b23cec47ddf06103eb8982af6123501b16674496d
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 0.9880

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.tw/app/431946152/roblox-speed-boats-free-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/robux-free-net_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/tiktok-free-view-like-video_GM835599320.pdfIn PDF document text
    • http://www.donjastubica.hr/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/top-5-ways-to-get-free-robux-nicsterv_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/do-you-get-free-robux-builders-club-on-the-weekend_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-use-cheat-engine-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bandicam.comIn 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_004_off000053bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53BF 38796 bytes
SHA-256: 573d044baaeaf8da480acf92e12f4608a7ec75ab81f3b05a7e1d32f5a6c17a7f
font_01_sfnt_off0000a918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA918 18628 bytes
SHA-256: f4d92ef0e61a8182cd700cb82614f47b561652987084dc31ae834e4a8e28bfa3

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