Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2dfbc8bd89d1ed…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 00:25:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af5a793dd7ce45514a5e7f7373204eba SHA-1: bb37799e2f18cc40276f000035f571c92d45a268 SHA-256: 4e2dfbc8bd89d1ed7ec92c21161e346ffbf378cbad4c62f7c8fb8acd7d10fc85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, including one identified as a potential download URL for game cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick users into downloading harmful content. While no scripts were explicitly extracted, the embedded URLs suggest a phishing or social engineering attack aimed at users interested in game-related exploits.

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/406889139/free-spin-coin-master-iphone-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/ultimate-driving-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-azure-mines-cheats_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/ass-hurt-free-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-no-hack-or-human-verification_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/trial-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/give-me-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-2021-september_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/games-like-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-hack-no-apps_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/earn-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-ram-in-vehicles-for-free-2021-roblox_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_off000030d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D3 22372 bytes
SHA-256: e76a8af50fcd3a8681feb6ef44ecd1154905ae33e72dd9a3c640aaf586a21dc8
font_01_sfnt_off0000628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 18340 bytes
SHA-256: 93824d9e1aceb83fcadc57d2324abd39ea6cbc22d65f7f2951186cf0df80c271

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