Malicious PDF — malware analysis report

Static analysis result for SHA-256 142da3f52a4ecaaa…

MALICIOUS

PDF

44.2 KB Created: 2021-05-19 12:21:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ab4264669ddee7105d3075ec1643b4b0 SHA-1: 56e71496d5854ab3dab48832fd32757fa698f96b SHA-256: 142da3f52a4ecaaa6adbeb55efeec5bec87eb661b4e3d6175270a8d750506a5b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures. The document body, though heavily obfuscated, contains references to Robux and game hacks, reinforcing the lure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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 https://netcdn.xyz/app/431946152/robux-earning-websites-game-hack In PDF document text
    • http://empresa-venta.hr/files/how-do-you-get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-link-daily-get-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-free-co_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/pokemon-go-free-candy-hack_GM1094591345.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://empresa-venta.hr/files/114-4-hacks_GM479516143.pdfIn PDF document text
    • http://empresa-venta.hr/files/www-roblox-com-robux-free_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_off00004ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC7 27184 bytes
SHA-256: 28bef19ad777c499b52b61d994dd6038c86fe4e9e9567a28e37bc389e9997aa4
font_01_sfnt_off000088e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88E6 18788 bytes
SHA-256: bd39057800d0036914d6d0737aa3197ac1fc2fb4678f369ab3a988c9d4b4e699

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