Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbacd07a738a386…

MALICIOUS

PDF

72.9 KB Created: 2021-02-25 04:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2f01f73ebfe4aced271dcfcd6fe919d0 SHA-1: 7d7c49cc2ab4d149119da1aeb93bbe1a77f844f2 SHA-256: 9fbacd07a738a386a5fc922411e71a506bd0c9945fc84d415f8d7a7941fc81cd
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC08 5124 bytes
SHA-256: 6c9563d91402bbfded497cfe1fa909fd0ec5da99e700cda41fd8003a438c1648
font_01_sfnt_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 12596 bytes
SHA-256: e055d9baa5450378fe1699bafe519307a341a0c244a204ce5e59d0be24fe5919