Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dea526a61aab402…

MALICIOUS

PDF

46.2 KB Created: 2021-05-12 14:04:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 613f7700c2ad931afa672b0e64acc6eb SHA-1: de988040feca2cf96ef5f0d56124ae22887af516 SHA-256: 7dea526a61aab402e8e716b53c53e796e3c164cd72555cc14274c5c2913435d0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency generators. The heuristic PDF_GAME_HACK_REDIRECT_LURE and PDF_MALICIOUS_REDIRECTOR_LINK firings confirm this behavior. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lead the user to a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/roblox-free-items-game-hack In PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-spins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://opac.ekonomi.up45.ac.id/repository/hacks-for-coin-master_GM406889139.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_off000049de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DE 25612 bytes
SHA-256: eadf60c6ae1d480888c17a30710a7aca463e3f5002eb04bc2ffc0691129164eb
font_01_sfnt_off000084fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FE 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000920f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x920F 18312 bytes
SHA-256: 0f8472b221d38b56aa502dc338bcb8175d724340a5db3d89f71a6c106e3918a4

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