Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2f9d10cebb6591…

MALICIOUS

PDF

71.7 KB Created: 2021-03-03 01:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b8fb010996885ba2a86d0abe2c141cde SHA-1: d0a9e3ea9b5a2b438c80439f91e5a7e6b80d7188 SHA-256: fb2f9d10cebb6591912546a71ff4c6ddb6e91c48bf60f76f502070485721eed9
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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/strik?utm_term=english+grammar+active+and+passive+voice+worksheets+pdf In PDF document text
    • https://cdn.sqhk.co/wifopuzuxiba/ggjbCia/22781804509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5fd6251bc8b85.pdfIn PDF document text
    • https://cdn.sqhk.co/naziwixolagu/hVMqnif/82074046247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406775/normal_5fe6328edd037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443325/normal_5ff508f795883.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392451/normal_600255e797ffc.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hhcV8nw/patanjali_yoga_sutras_yamas_and_niyamas.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/zatazewoz/citing_sources_mla_format_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/74389283637.pdfIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/42274626963.pdfIn PDF document text
    • http://zubidimuxazevow.epizy.com/las_medias_de_los_flamencos_personajes_del_cuento.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/8092898915.pdfIn PDF document text
    • https://s3.amazonaws.com/lomuper/6175034124.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/kowalski_status_report_meme.pdfIn PDF document text
    • http://xovanixavujanu.epizy.com/json_web_token_tutorial_javascript.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_off0000da60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA60 5744 bytes
SHA-256: 0f956e9bc59127e3b5c28639896b19b4fc4809a5ca921ea348c777bc704ab50e
font_01_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 10512 bytes
SHA-256: e6674cd7f85115bd35aa7de7a1f9fea0e5146bbe0f8a7447a321e99a53333326