Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a79255bb141a1a8…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 15:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bfaf206b8fd3cc4b4a910e6ed24297f0 SHA-1: 2bb48ce1deb93577a5069052cfff6fdd9a3f2d65 SHA-256: 4a79255bb141a1a837aeaad439ab367af685a4c09e67557da17b92d73472093b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting "free game hacks" and "free robux". The document body and heuristics indicate a lure designed to trick users into clicking these links. While no scripts were directly extracted, the nature of the links suggests a potential for further malicious downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/free-game-pack-coin-master-game-hack In PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/www-rubux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-pc-hack-tool_GM406889139.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
stream_003_off00004ac6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC6 25208 bytes
SHA-256: 50ebdc893dd8004f80edfe04f6e5292b32dae0f536674ab4fbb449e68729c2b1
font_01_sfnt_off000084a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A3 18292 bytes
SHA-256: 50801c1212ba10e6fec772be1621f3a9c69628be9ab96fac5d906e32cadaa888

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