Malicious PDF — malware analysis report

Static analysis result for SHA-256 05fb1ef227fd448d…

MALICIOUS

PDF

33.1 KB Created: 2021-07-05 13:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: abe11f58c595c6eca6217d767783b062 SHA-1: 67004ada862718386646854502e023ceecaae145 SHA-256: 05fb1ef227fd448d5770130f50a05d463b77a3a9258d6c1b96ed8f5cf80d2717
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/479516143/toolbox-for-minecraft-ios-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/roblox-diary-of-a-noob-download-prison-life-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/games-for-free-to-play-fortnite-like-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/best-roblox-hacking-software_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-robux-using-javascript_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/getrobux-come_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-genorators_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/can-u-get-free-robux_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_off00002e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E71 21768 bytes
SHA-256: 71c015899da531fd22ec8372506d797a66bf3bb68b167a1b588bf321c0690383
font_01_sfnt_off00005e37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E37 18440 bytes
SHA-256: 1f04f6f827e877cd67352bbda00ecfd0dc30e4046a1f8f0f93c71b20870d902f

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