Malicious PDF — malware analysis report

Static analysis result for SHA-256 4041740b3f91718e…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 17:42:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8123017bee3bad7ebb65123dfc99848a SHA-1: 873e144191d9519ae3e44acf2486d8a12c3bc3c5 SHA-256: 4041740b3f91718e6a11f9d90ad20916ef8d3f5f8daf1482ba65ce0858be3dea
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.co/app/431946152/now-to-change-your-roblox-name-for-free-game-hack PDF link annotation
    • https://www.atrax.hr/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/cool-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/hacks-for-robux-no-human-verifycation_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/robux-sites_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/robuxian-robux-hack_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/roblox-free-printables_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/free-minecraft-account-and-password-generator_GM479516143.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_off00003028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3028 22220 bytes
SHA-256: 82e26578daba6dcbe3b8d3b115f11a244cfa2830d1db1aae1529475a6398ab46
font_01_sfnt_off00006188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 19540 bytes
SHA-256: cf6316a046522fc4ca648131a3cd747faac8fffa8a279222b00ee4f40b7c9cc7