Malicious PDF — malware analysis report

Static analysis result for SHA-256 0641d342c2f993db…

MALICIOUS

PDF

42.2 KB Created: 2021-05-14 06:21:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e9967ea97ebf5db50b17c9e44e4fffd8 SHA-1: 07927f156b8a61525b33f1748493fa63bffe0830 SHA-256: 0641d342c2f993db181b911579bd3e285eeb66114b79c142d1fbc075aa75ce74
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs reinforce this lure by mentioning game hacks and free currency. The presence of multiple malicious links suggests a coordinated effort to redirect users to potentially harmful sites.

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/406889139/free-diamonds-coin-master-game-hack In PDF document text
    • http://clinicadentalvilaplana.es/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/www-robux_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/coin-master-free-coins--spins_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://clinicadentalvilaplana.es/images/hack-game-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
stream_003_off0000496c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x496C 24788 bytes
SHA-256: 4060aeb4ea2784581337281375c78ba5c764618aa9f2c1e91f56578dbcfa27eb
font_01_sfnt_off00008267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8267 18312 bytes
SHA-256: 023a9ba599e82108ef095f60474bccbb9207093afb07317a246e7535a81f1180

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