Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4afecbd8424306c…

MALICIOUS

PDF

45.3 KB Created: 2021-06-08 13:15:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 251418d274ead47c6c387d923762df38 SHA-1: 7359450951c8141022a1dfcfd7be4f45f0b8c2df SHA-256: d4afecbd8424306c6bde515bed83394511a3a27e675cbe4f5a6c3a3739ab4a78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as 'free Robux' or game hack generators. The primary lure is the URL https://netcdn.tw/app/431946152/how-to-get-free-robux-no-survey-2021-game-hack, which is part of a chain leading to further malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/how-to-get-free-robux-no-survey-2021-game-hack In PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-costing-clothes_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-pastebin-no-wait-2021-may_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/how-to-hack-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/blueberry-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/cheat-roblox-freedraw_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/cheat-roblox-pc-speed-run-4_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-gift-cards-2021-25-8_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/play-this-game-for-free-robux_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-may-2021_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/cheat-engine-work-on-roblox_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-gift-card-10-25-50-roblox_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/free-robux-no-password-or-human-verification_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/diamond-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://meerdanverzekeren.nl/wp-content/uploads/fsqm-files/roblox-free-rixy-accowt-live_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005398.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5398 24628 bytes
SHA-256: 1581f1fd13eaa6982d2fc7f708dcb970a05cb158c6a1da2c3109bc3d59581ad2
font_01_sfnt_off00008c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 18980 bytes
SHA-256: 98f32efe023f936e4a4f0ce9118ce8845e62b2894df1b033939a53723a2133d3

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