Malicious PDF — malware analysis report

Static analysis result for SHA-256 adbd572eea59c0fc…

MALICIOUS

PDF

32.9 KB Created: 2021-06-27 17:22:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 88ec8a29bf5ad45e9421aa4af8936b5a SHA-1: 121768b007fead8e07621d6360335a0f88da4f94 SHA-256: adbd572eea59c0fcc7f85e81fefe9f8472a7dbd7793d51ef649b83dcc8db6f71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free currency' lures. The ML classifier also flagged this PDF as malicious. The primary attack pattern involves social engineering to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/robux-hack-website-game-hack In PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-2021-new_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/deathrun-roblox-hack_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/how-to-get-free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/hack-para-mocap-dancing-vip-gratis-roblox_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/pubg-uc-online-generator_GM1330123889.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://gaushalango.com/uploaded_files/userfiles/files/minecraft-realms-free_GM479516143.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_off00002b30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B30 21952 bytes
SHA-256: 3b45d3f15b22b1cb20e9a6ff34facb692eb7c3b26ec94b154ad2e785d9bf6ddc
font_01_sfnt_off00005b8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8B 19144 bytes
SHA-256: 0acbeca2f95bfbb767124a32547759b7e7e7e30e42cc040888805cbe90d21f63

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