Malicious PDF — malware analysis report

Static analysis result for SHA-256 339289ea40ff995c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 11:00:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fef5a54843b2c329143e08b5902decab SHA-1: f8fb3b37e37ba87658d5a0f2f1a88fd042869e7e SHA-256: 339289ea40ff995c606e0920f409b64b60cae11b5c0ef6ba4e07f07225dd980a
82 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' or game hacks to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/free-robux-in-a-game-game-hack, is identified as a redirector, suggesting it leads to a malicious download or phishing page. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate an attempt to exploit user interest in free virtual currency to deliver a malicious payload.

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/free-robux-in-a-game-game-hack PDF link annotation
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/how-to-get-free-robux-from-slingtv_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/unredeemed-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/robux-giver_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-no-human-verification-or-survey-2021-no-download_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/what-is-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/roblox-free-robux-scam-uncopylocked_GM431946152.pdfIn PDF document text
    • http://himalayandiscoverytrek.com/userfiles/files/free-robux-website_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_off00003189.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3189 22352 bytes
SHA-256: 3713b181b0abb2a1f5929e24b385cb20e5e2bc5c85c5055f35de7fcdb5462c28
font_01_sfnt_off0000637c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637C 18976 bytes
SHA-256: 5ee5f345da61200c3d54c81c09bd966437bacc50123b3cbe0bcc6e2ca9b69756

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