Malicious PDF — malware analysis report

Static analysis result for SHA-256 83753db16091ec25…

MALICIOUS

PDF

66.9 KB Created: 2021-02-16 08:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1a277e54611b9fae1fdd586724811433 SHA-1: b4187804cf8648635d02d1c5086622768ee63833 SHA-256: 83753db16091ec25d5e25a7a4739a30cc37415c5b70c628f8b9e5d1a955e2fb9
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/wix?keyword=ap+language+and+composition+textbook+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4463538/normal_602026312703e.pdfIn PDF document text
    • http://copyright-central-media.com/bojuvipisovoxupasoxowe6bcas.pdfIn PDF document text
    • http://wibofot.22web.org/hesperia_water_quality_report.pdfIn PDF document text
    • http://7gusevshop.website/ancient_history_magazineycjnd.pdfIn PDF document text
    • http://artdebug.site/94222704675em638.pdfIn PDF document text
    • http://1xbet-sportstavki.fun/pitutezakoba29e7z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420599/normal_60070b302b468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5fca7034ad5c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_60247cda0058a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fe406ed2481f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_60214c75bed27.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zizematav.epizy.com/zijulifigokejub.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/mebevigum.pdfIn PDF document text
    • http://mowadavukusut.epizy.com/faxonosu.pdfIn PDF document text
    • http://fakozavovenabe.rf.gd/pirovebux.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_off0000c8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EB 5744 bytes
SHA-256: 0e4a5f5c80a1ed7d2b1774912736ddb6d2c7e5a07662451493ce9b283cc6b211
font_01_sfnt_off0000dc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7C 9972 bytes
SHA-256: 2c09965e83802b1dd05d531a516fd0c7ae57102b09c611ae22915c8d1dd4e62b