Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f599eaaf21d3692…

MALICIOUS

PDF

71.2 KB Created: 2021-02-05 04:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: eb5a12fe1c0215380d56ca40e614e352 SHA-1: b6d1ffef779e84ba58ae2da25c865d2c1239b70a SHA-256: 5f599eaaf21d3692936476658595356be4411484a32c18fb92dd26b11815f685
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=adobe+air+apk+games In PDF document text
    • http://fazoluniguket.iblogger.org/citation_page_format_mla.pdfIn PDF document text
    • http://lujuvudav.22web.org/zisunutosuzanodopaso.pdfIn PDF document text
    • http://luranowebereni.22web.org/nuzaxi.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/pilazi/printable_cornell_notes_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/17357162038.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/xubimokamemaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/boruto_uzumaki_wallpaper.pdfIn PDF document text
    • http://nanoxamovafosox.epizy.com/futura_pt_bold_font.pdfIn PDF document text
    • http://leriwegozeko.epizy.com/74490457564.pdfIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/nanikigomoxu.pdfIn PDF document text
    • http://tagugatukosag.epizy.com/statistical_modeling_by_wavelets.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/psychoterapia_poznawczo_behawioralna_popiel.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/free_software_end_user_license_agreement_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/70882329186.pdfIn PDF document text
    • http://nimoxorud.epizy.com/monthly_employee_attendance_sheet_format_in_excel.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_off0000d9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C0 5440 bytes
SHA-256: 14896b69c393343383b6dea1e209228ae5c3c37c606f445d9c30a40f25a2e6f3
font_01_sfnt_off0000ec2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2A 10672 bytes
SHA-256: 7aeee984ae171e695c14029fc4d914d181dcff834a886ec4e63f7ecdf908e695