Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fbdc2d632eb06f9…

MALICIOUS

PDF

33.7 KB Created: 2021-06-22 22:39:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a02e8b2ab8e7f23daf1887177ad7d680 SHA-1: 4f4bc0982f8729bfcc4f7557a9d52eaff2c5eeee SHA-256: 1fbdc2d632eb06f93976eb21780a41d5ab38bde017eeda671b69a61ba7d63155
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' and game hacks. The ML classifier strongly indicated maliciousness, and the embedded URLs are associated with known malicious redirectors. No scripts were extracted, but the document's primary function appears to be directing users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-unlimited-robux-in-roblox-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-do-you-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cheat-codes-for-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coding-tshirt-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-name-charnge-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-hacks-code-admin-commands_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-place_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_off00002d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D77 21744 bytes
SHA-256: c43967b9fae66fae9024e46f73712890efcf8813c18b225eaca90b1b7002a88a
font_01_sfnt_off00005d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 19448 bytes
SHA-256: ba350fd01c82819cde4a28fedc4b32fbc950e2a495c264ee0084e07ef1988e15

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