Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e37c82b6b57373a…

MALICIOUS

PDF

78.3 KB Created: 2021-02-05 11:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 3250aa03bd6e5cb327aed0dbb9762af7 SHA-1: 0e0e9183c4f410e432a91804f2fd38668f294be1 SHA-256: 1e37c82b6b57373ae52eb9a79e6052e055a8f925c391773616b587937c03e941
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/aws?utm_term=frequency+distribution+table+worksheet In PDF document text
    • http://rufefoj.iblogger.org/28789664493.pdfIn PDF document text
    • http://easterthjg.com/geek_smarter_shopping_sitecpi1l.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/bk2icT9/30390843085.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/Ohigdgf/93651414682.pdfIn PDF document text
    • http://xujilutobidiko.iblogger.org/classeur_souple_format_a4.pdfIn PDF document text
    • https://cdn.sqhk.co/sotatixorawi/gfiiBb5/kefobalu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://faxanudof.epizy.com/cgi_company_full_form_in_english.pdfIn PDF document text
    • http://legofovivaxom.epizy.com/votereterepalakozagukimen.pdfIn PDF document text
    • http://dogabofeki.epizy.com/66442920708.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/gesafanadariwekikajituma.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/mosokaz.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/35249177589.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/ups_2019_rates_and_service_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/48078287783.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/57124134179.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_off0000f2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 5508 bytes
SHA-256: 4120ab03deb6d80b5f3e77a2378daf0b2f2a82cf7be17abcca833f6c8d861727
font_01_sfnt_off000105c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C1 11388 bytes
SHA-256: f0c03b89575d4202b9a90623694da026f804178bb97d5c55c16d51588d14afb7