Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ab7d3062faeb4b…

MALICIOUS

PDF

72.8 KB Created: 2021-02-14 22:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: af50ce54347079047dbb72f4fc0c2759 SHA-1: f8d2338d6e1e9ad0218819cb5bbbd4cc0fa5cfc0 SHA-256: c3ab7d3062faeb4b5165667d5705174033e0b5030510fd3dead924eb0b0c8d8f
184 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.
  • 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://crophysi.ru/wb?keyword=marriage%20curriculum%20vitae%20format In PDF document text
    • http://lufavometazajur.iblogger.org/chromosomes_and_meiosis_study_guide_a.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/omie6ij/48537555562.pdfIn PDF document text
    • http://nuvuxek.iblogger.org/15687587559.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/icidijj/69976328851.pdfIn PDF document text
    • http://wuwisometojone.66ghz.com/75465340966.pdfIn PDF document text
    • http://zafogititug.22web.org/16219753768.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sujetokotew.rf.gd/sengoku_basara_4_sumeragi_translation_guide.pdfIn PDF document text
    • http://talakukatutevib.epizy.com/gazebatuwoni.pdfIn PDF document text
    • http://bepinutarefe.rf.gd/zaxegoni.pdfIn PDF document text
    • http://dibadedogiw.epizy.com/bike_racing_mod_apk_latest_version.pdfIn PDF document text
    • http://tukozadagafewan.rf.gd/bozomopatifesoganabof.pdfIn PDF document text
    • http://zezenagiwetubav.rf.gd/cbt_nuggets_mcsa_2016.pdfIn PDF document text
    • http://pazovegisot.epizy.com/84236698655.pdfIn PDF document text
    • http://dupetomumipur.rf.gd/19074353085.pdfIn PDF document text
    • http://luzawuwu.epizy.com/basic_shapes_worksheets_for_grade_1.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_off0000df0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0B 5088 bytes
SHA-256: af756ab05b99eee98a11e9e91586319ed605dd1f14256216834b6d9acf3fd7df
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 11260 bytes
SHA-256: 24c7cb293b739b3b6ec149652e0ee64071531dcf38ed8de9ad7773db6d519b2a