Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2f5eb34f9b5abc…

MALICIOUS

PDF

71.7 KB Created: 2021-02-13 13:11:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cd24c362dad5ba6174cdb16f8ca85bfa SHA-1: a65bb528e4827f350e705969a6a9288a25bb9b07 SHA-256: be2f5eb34f9b5abc861ada5f2c2a7c7f216c538c7305dbf7d96b545229435ed0
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://leonvi.ru/wb?keyword=critical%20ops%20apk%20android%204.%202 PDF link annotation
    • http://vafutixon.22web.org/46532713651.pdfIn PDF document text
    • https://cdn.sqhk.co/bebuvasipen/l2gjjaS/50264783509.pdfIn PDF document text
    • https://cdn.sqhk.co/kupawusel/8AqZ8xu/gupuxedoxogojalarudelemo.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/UhbxidV/rotenipenazuwaviw.pdfIn PDF document text
    • https://kedaweva.weebly.com/uploads/1/3/4/8/134895813/5561314.pdfIn PDF document text
    • https://dotaterezisal.weebly.com/uploads/1/3/4/7/134771172/fd62a4b8a67122a.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/fasaxuxelewu-vuwevasut-sinatal.pdfIn PDF document text
    • https://rupasofo.weebly.com/uploads/1/3/4/8/134892789/lunovizopomejaz_xefatenijonopu.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/jAidMwq/rifuzav.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/hiehbwk/32557464652.pdfIn PDF document text
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/zutogodedipuwalum.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/39883939975.pdfIn PDF document text
    • http://petikagemejol.rf.gd/used_at_t_android_phones_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/daniwodug/62267914732.pdfIn PDF document text
    • http://wubogijogazerew.epizy.com/tepowabarotubarujarole.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_off0000db71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB71 5288 bytes
SHA-256: 28559a2b97576d0e9ca089d26b0adc88ec28d9be0ead76b67f3e4bf4960cd2f6
font_01_sfnt_off0000ed83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED83 10776 bytes
SHA-256: 050296da42a974f4cc4ca0336e03f8d3d1669edfe567e1763110a30c8fdfe47b