Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1d3cd726e920a2…

MALICIOUS

PDF

88.8 KB Created: 2021-02-24 09:31:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9d3ad9c1916e8c18b5945e8d224f4952 SHA-1: bd72b5056c5d1663e837b9532710a4e502b38258 SHA-256: fe1d3cd726e920a29c89f4daa8f1b851bf1e62ffd68028526f322254173cdd1b
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=monopoly+rules+money+pounds In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379491/normal_6021296b979ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488349/normal_601952a3c7499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469370/normal_5ffa32e6e7624.pdfIn PDF document text
    • http://bigomipami.22web.org/inequality_for_all_graphs.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/gcVXXjb/real_fruit_bubble_tea_nutritional_information.pdfIn PDF document text
    • http://hookup154.space/galvin_green_women_s_size_guideb8ud8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415754/normal_5fcfe48592ea1.pdfIn PDF document text
    • http://sexedate69.site/the_crucible_elizabeth_proctor_quote8fqvx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://memajale.epizy.com/simba_a_full_movie.pdfIn PDF document text
    • http://wozawexopad.epizy.com/35667709440.pdfIn PDF document text
    • http://gigitepusiligo.epizy.com/sample_format_certification_of_employment.pdfIn PDF document text
    • http://resaruxowepu.epizy.com/58766325738.pdfIn PDF document text
    • http://lodajozaki.rf.gd/valoracion_apgar.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/27588661980.pdfIn PDF document text
    • http://vozajaw.rf.gd/hiding_in_plain_sight_horde_guide.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_off0001209d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1209D 5000 bytes
SHA-256: 54bdaa483fd877cf27d1706524f799642419332a4af2a158e6c8aded6c79a1ab
font_01_sfnt_off0001319a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1319A 10928 bytes
SHA-256: bddef87fdac542f8280899764c2a70b2193f3680f7c1e2c2ef525a020c9328cd