Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcdeb4be1d918c5b…

MALICIOUS

PDF

46.4 KB Created: 2021-06-10 15:28:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e04039fa0e30890d92474ce8f115f779 SHA-1: 93f02f2e655d69d6f13123d049d4d4e943645697 SHA-256: bcdeb4be1d918c5b26bf896f0041907edba2aed334ab41765c6e2250102de6a3
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 items'. The primary lure URL is https://netcdn.tw/app/431946152/codes-roblox-free-items-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/codes-roblox-free-items-game-hack In PDF document text
    • http://www.zdravazena.sk/images/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/earn-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/mcpe-download_GM479516143.pdfIn PDF document text
    • http://www.zdravazena.sk/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/tiktok-free-zong_GM835599320.pdfIn PDF document text
    • http://www.zdravazena.sk/images/free-tix-anmd-robux-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.zdravazena.sk/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.zdravazena.sk/images/village-coin_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
font_00_sfnt_off000052bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 27564 bytes
SHA-256: b9377ea24e41058d09e8d4f481505ef11a20ee621110448f3a0e36e2f551153d
font_01_sfnt_off0000921c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x921C 18488 bytes
SHA-256: 998e2c500959880f312484bffd558c6ff7250ad4c99f8ad2ef09888cc3bf84a1

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