Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c4f56cffeec09c5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 14:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 598b8e8a0185fd4ba8ecbabb226ec47e SHA-1: 720f51bdfb8ff76647fdb11a1c7ab65cd53d06dd SHA-256: 6c4f56cffeec09c50102998b8edd918347ec8aebe6831fc5c738ea611ab6ecf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and generators. The embedded URLs and document body content strongly suggest a lure to trick users into downloading further malicious content. No scripts were extracted, but the primary attack vector appears to be social engineering via deceptive links.

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.tw/app/431946152/roblox-admin-hack-game-hack In PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/apoc-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-games_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/hack-roblox-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-get-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-no-scam-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-using-points_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-gift-card-10-25-50-roblox_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-gift-cars-for-roblox_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-cerberus-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_off00002dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD8 22824 bytes
SHA-256: 16acbc4bfd1a0c2ae647f2f81660182a96518b6c1f45ab829ac912b40f8476f0
font_01_sfnt_off000060d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D2 19208 bytes
SHA-256: e5ca730804d66bebf4e5e52c5751bcc2b57707170b28c3b0ce40a6afaace4474

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