Malicious PDF — malware analysis report

Static analysis result for SHA-256 a028afd9dffe5752…

MALICIOUS

PDF

70.1 KB Created: 2021-02-20 07:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d79a98bd1df156d03b4e050669623bf6 SHA-1: b9782a4924d13481240942f8f1977bd137bc8829 SHA-256: a028afd9dffe5752595cdc3239525ebb96d89bd13686d4cf87fe8ecfc0e727c7
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wb?keyword=the%20crown%20season%204%20episode%203%20cast In PDF document text
    • http://wwbook.org/wojifewudibubm2f51.pdfIn PDF document text
    • https://puxupukesif.weebly.com/uploads/1/3/0/8/130813524/varabitu.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/luwaxika-tobedix-juzisako-lamutopidoromo.pdfIn PDF document text
    • http://getporte.xyz/255092937860ih08.pdfIn PDF document text
    • http://taygerr.com/plum_xl_infusion_pump_service_manuali2c9h.pdfIn PDF document text
    • https://kenoduzuran.weebly.com/uploads/1/3/5/3/135350653/3587251.pdfIn PDF document text
    • http://fisusuwisefib.22web.org/wusupozeberajomebi.pdfIn PDF document text
    • https://febelozo.weebly.com/uploads/1/3/4/5/134599394/a142e0d6d.pdfIn PDF document text
    • https://dinorega.weebly.com/uploads/1/3/3/9/133999175/df197d9e692f3.pdfIn PDF document text
    • https://vijekufimukij.weebly.com/uploads/1/3/0/9/130969895/salumonitomi.pdfIn PDF document text
    • http://porn77.design/99480907734l0ofu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zifopodisinuri.rf.gd/weruzaxetuguvasewo.pdfIn PDF document text
    • http://gavemuvivagezed.epizy.com/96382722089.pdfIn PDF document text
    • http://wejopapoxevore.epizy.com/13736489705.pdfIn PDF document text
    • http://timarerovasezot.epizy.com/98761072917.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_off0000d554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD554 5424 bytes
SHA-256: e20eaec741dc3f4bf4e0db9415cdabae4d3be0d2ab736b9b111199c5bafda9b3
font_01_sfnt_off0000e7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D7 10536 bytes
SHA-256: dc8f2d95c88e34f6be7b460f8f25c9fdea9225268379994d3b2e45054c612fb7