Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b7248db5c86478d…

MALICIOUS

PDF

35.6 KB Created: 2021-06-29 21:48:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1889b1fa5221e0474e9fb2d97f238d8 SHA-1: 582c81befd6b758ae56cdb2cce58e9b4def5710d SHA-256: 4b7248db5c86478d0567ee77e221327216b6d603da993e2b6c615c4ba444c1fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document employs a lure related to game hacks and account compromises to entice users to click on embedded links. These links redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document's content and structure strongly suggest it's designed to lead users to potentially harmful websites, likely for credential harvesting or further malware delivery.

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.co/app/431946152/roblox-account-has-been-hacked-and-password-has-been-changed-game-hack In PDF document text
    • http://foo.com.tw/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-catalog-heaven-hack_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-com-free-online_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/code-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/cheat-roblox-windows-10_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/obbys-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/roblox-earn_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://foo.com.tw/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://foo.com.tw/files/mcpe-master-coin-hack-apk_GM406889139.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
font_00_sfnt_off00003136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3136 22876 bytes
SHA-256: 966562ce488f7ac37b7dc858539fb47244262e229a47bc86084096758c27edae
font_01_sfnt_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 19560 bytes
SHA-256: 013e27b7ac55da87d0ff72f12615bb91bf23377b81d6b1a8f0efcf0173f38940

Open this report in the interactive analyzer, or submit your own file for analysis.