Malicious PDF — malware analysis report

Static analysis result for SHA-256 d355cc725edf7826…

MALICIOUS

PDF

45.2 KB Created: 2021-05-14 03:45:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a9f7f7bb1a866383cf47c53558e4c9f4 SHA-1: 544a171e3ffa63834b8f3f44d8153e16e4be44e5 SHA-256: d355cc725edf7826f4c5528bc6afdc7dbbebea84e79b6ed756556a9c0928d982
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and domains hosting what appear to be malicious PDF files, disguised as game hacks or generators. The document body, though heavily obfuscated, contains a URL that aligns with the heuristic findings, suggesting a lure to download further malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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.xyz/app/431946152/free-roblox-cards-pin-number-game-hack In PDF document text
    • http://fmbompastor.com.br/images/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://fmbompastor.com.br/images/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://fmbompastor.com.br/images/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4953 24700 bytes
SHA-256: 3a8ea91b43ad5e70c053332e3188457da2ff98558d5596408a66b0bbb8b4eefa
font_01_sfnt_off0000826e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826E 2836 bytes
SHA-256: fd98c8f6e7c2e74bbd5822409159a93ac5c94da083ae4c2eb269d4284375f9e8
font_02_sfnt_off00008c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C13 19024 bytes
SHA-256: d202742233b17ada8e60ef392bbe1d59108b00a04bd9cee781b4229daa03d739

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