Malicious PDF — malware analysis report

Static analysis result for SHA-256 c55257e2591b0304…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 19:12:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5f81fdedf361650562a9c06cc4cf6665 SHA-1: ec2ed0ff8b47d0a3dc393978af5916aba81cfb6c SHA-256: c55257e2591b03046e81679229dacc18606c7d3f930484d95bb25b846d52401b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted at http://netcdn.co/app/431946152/roblox-apocalypse-rising-dll-hack-download-game-hack, which is flagged as malicious. The document body and heuristics indicate a lure for game hacks, likely to download malware or lead to further phishing. No scripts were extracted, but the embedded URLs and redirector behavior are strong indicators of malicious intent.

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-apocalypse-rising-dll-hack-download-game-hack In PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-skin-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/coin-master-hack-version-apk-download_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-link_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/what-is-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/roblox-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/creator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.mtsn4jkt.sch.id/__statics/gudangsoal/files/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00003331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3331 22204 bytes
SHA-256: 6a0577b3ea4f389f7d0cd47e93452c9a870781d02258157220d0a5ace68d6f25
font_01_sfnt_off00006476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6476 19640 bytes
SHA-256: 4fd7484bdb4ef9fa9ee6a8fd6e3e2252993193a8213ea75f8847078dd15a0c6a

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