Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcf1f0331b786cd0…

MALICIOUS

PDF

65.7 KB Created: 2020-11-09 21:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: acf52f5c2724f481c5d1acbc12aab109 SHA-1: 297f4e8d4c25603cceb77bf44f600930197f7e19 SHA-256: fcf1f0331b786cd0321efd23abbb2e35deedcae372c50ef0fb5b58f40eb1d76a
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://ggtraff.ru/aws?keyword=free+venom+streaming In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f97749a61941.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/bojafazes/air_brake_system_seminar_report.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/kepinovif.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/equivalent_ratios_worksheet_6th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/13706741730.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/biodata_template.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/theme_of_the_most_dangerous_game_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tagorarib/solidworks_vs_autocad_inventor.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/gmail.com_email_inbox_messages.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/sikaza.pdfIn PDF document text
    • https://s3.amazonaws.com/waxejajinigafu/41656160118.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_off0000c511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC511 4988 bytes
SHA-256: f19c6a6850ed6a8c0de9eddd5ced41c44bfca70823a16336fab5bd346159c77e
font_01_sfnt_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 10752 bytes
SHA-256: 73b9248bcf8b90750e03f0da4235a23e81e8137768d240b24c793cf7272f56d2