Malicious PDF — malware analysis report

Static analysis result for SHA-256 919e1ebfcc32d29b…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 11:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d5a7a8b422d92e553eea0a10499054b2 SHA-1: 91b50a15acb0878f70bec56dd132420134e21f0a SHA-256: 919e1ebfcc32d29bd097a8da73a7b117ca3e44e016c882c49327192c410aef52
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The ML classifier also flagged this PDF as malicious. The embedded URLs are designed to lure users into clicking, likely leading to further malicious content or downloads.

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/haktuts-coin-master-free-spin-link-game-hack In PDF document text
    • http://ambingenieria.com/images/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coinmaster-spin-ml_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/free-games-like-coin-master_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://ambingenieria.com/images/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://ambingenieria.com/images/get-free-spins-on-coin-master_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_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 25424 bytes
SHA-256: 599b9ba4a27a2f6156dee51b1ed478cbe1fc091492b8c9da7c019eefed97b413
font_01_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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