Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b99d60a6d7f3618…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 09:11:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e7257b229a6caeb5fec947bd2c081b58 SHA-1: f0ba8dc8cf0d7eafadd1c34fbd86039ca7f8d9e6 SHA-256: 7b99d60a6d7f3618501112d07347723b9998155b3b9b69caec9ec4c6755d39a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised as a game hack generator. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a social engineering lure designed to redirect users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-font-free-game-hack In PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-website_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/coin-master-free-spins-ios_GM406889139.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.guidaturisticaverona.it/images/how-to-hack-coin-master_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_off000048da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48DA 25044 bytes
SHA-256: 20703914c4ab7c75ec5b6c5775de0310ebb41135824e718d6db6351668e8b155
font_01_sfnt_off00008271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8271 18052 bytes
SHA-256: fc18e09b38e7f37cf7e275b91981e3530b795bdeaada945aa3ce95e8818dbc1b

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