Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a3e0290651081f…

MALICIOUS

PDF

44.3 KB Created: 2021-02-25 04:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: a4ec1a2f258bba6405a3b84b1c7e01eb SHA-1: bcdb8f4cb5860d0ee99b82a80a633607f0816368 SHA-256: 25a3e0290651081fa65bd29948222c10fcce307fc544152895b3db375be5f974
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files, indicating a link farm designed to distribute malicious content or phish users. The presence of a link to a known malicious redirector further supports this. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification also indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7180

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/award?keyword=kindle+fire+7+user+agent In PDF document text
    • http://parhelifrl.space/free_avast_for_windows_7_offlinew4on1.pdfIn PDF document text
    • http://cartest.pro/stick_lacrosse_skills3o1un.pdfIn PDF document text
    • http://mantenancie.com/tewapaporurufdzkp0.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/murife.pdfIn PDF document text
    • http://instapriz24.site/kejogexarexariwesipovon205ld.pdfIn PDF document text
    • http://timurberg.ru/268154437548j1s7.pdfIn PDF document text
    • http://pixxel.life/how_to_take_moon_pictures_with_nikon_d3400jjh7e.pdfIn PDF document text
    • http://webmastervlad.ru/rebimuli4r62z.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezux/gebupifabineraxa.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/adele_-_someone_like_you_live_at_royal_albert_hall.pdfIn PDF document text
    • https://s3.amazonaws.com/vipuxafol/nikon_m_308_scope_caps.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/farafazizisisosanudobezoz.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/bibliotecas_unam_formato_apa.pdfIn PDF document text

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