Malicious PDF — malware analysis report

Static analysis result for SHA-256 52cfaa3789ee4b7f…

MALICIOUS

PDF

70.9 KB Created: 2021-02-23 19:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35b1eab99ccedd52303a69f9aa1f0287 SHA-1: 6be741c2a811b4673ac054c3cf3af0a9fc533521 SHA-256: 52cfaa3789ee4b7f2d6f5ce922a8011424899abdeb7ed504ef651db43529e913
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://crophysi.ru/wix?keyword=halo+the+fall+of+reach+pdf+free In PDF document text
    • http://netzamka.ru/kigajukunadojegozavenotiscj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454421/normal_6002152d2ff8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462093/normal_601197eea7c06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485946/normal_5fe1418f963bd.pdfIn PDF document text
    • http://tedalaz.66ghz.com/84994031482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476569/normal_6016b2e7571e8.pdfIn PDF document text
    • http://lavka-karamel.ru/dawevetenoi5128.pdfIn PDF document text
    • http://money-team.site/color_switch_on_scratchhl004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xefezesebusu/ccleaner_pc_uptodown.pdfIn PDF document text
    • http://nifopufu.epizy.com/wugomolalufije.pdfIn PDF document text
    • http://gowegonuma.epizy.com/amiodarone_induced_thyrotoxicosis_case_report.pdfIn PDF document text
    • http://jopiliseduvorop.rf.gd/acknowledgements_page_template.pdfIn PDF document text
    • http://budibebolimuxo.rf.gd/femakitokusuberuxut.pdfIn PDF document text
    • http://xenuduximowub.epizy.com/55512796147.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 4660 bytes
SHA-256: a63bf11779568cdc2c1a17577dd50e6f1b19177d65b5957d67c096caf0b7b702
font_01_sfnt_off0000dbb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB2 10416 bytes
SHA-256: c7e088548451f201a6af661d649a694c1da200ddf07825de5df041b231562cc5
font_02_sfnt_off0000ff3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3E 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333