Malicious PDF — malware analysis report

Static analysis result for SHA-256 58292459f3c3d603…

MALICIOUS

PDF

84.7 KB Created: 2021-05-30 23:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5959e1476a351f94341b8023cd2b95b4 SHA-1: 85e12458362ec7f117f6a40efe08de97ac9b31b4 SHA-256: 58292459f3c3d603e322672b886a695fe520a28611c0bf9288ca2e6b5bf97ddc
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=how+do+thrush+turbo+mufflers+sound PDF link annotation
    • https://vorevowupi.weebly.com/uploads/1/3/4/6/134633589/kurujemifaw.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/c66c28e1.pdfIn PDF document text
    • https://kexawugidatenak.weebly.com/uploads/1/3/4/3/134338825/042f8.pdfIn PDF document text
    • https://zixudepapu.weebly.com/uploads/1/3/2/3/132303172/1221641.pdfIn PDF document text
    • https://varivupe.weebly.com/uploads/1/3/4/4/134480773/dirufumewipu_nizega.pdfIn PDF document text
    • https://sowovejapa.weebly.com/uploads/1/3/4/7/134709895/2163421.pdfIn PDF document text
    • https://kibolimu.weebly.com/uploads/1/3/4/8/134872751/01133d556d84f.pdfIn PDF document text
    • https://kebakikuvoti.weebly.com/uploads/1/3/7/5/137513313/6e9a4b68c03f.pdfIn PDF document text
    • https://dupafubakatato.weebly.com/uploads/1/3/5/9/135961249/7221471.pdfIn PDF document text
    • https://mifavawuzizadax.weebly.com/uploads/1/3/5/9/135977912/numitavibure.pdfIn PDF document text
    • https://wenibowefopari.weebly.com/uploads/1/3/0/8/130814001/43af09.pdfIn PDF document text
    • https://nitowapesapu.weebly.com/uploads/1/3/4/4/134442046/1490247.pdfIn PDF document text
    • https://marelepo.weebly.com/uploads/1/3/0/7/130738501/8227bc.pdfIn PDF document text
    • https://kitetunevoneg.weebly.com/uploads/1/3/4/7/134703129/garen-balokupoxo-puwikuwowi-tomisakevozipab.pdfIn PDF document text
    • https://vepakuwaderim.weebly.com/uploads/1/3/4/6/134699920/6336707.pdfIn PDF document text
    • https://damafofazawarag.weebly.com/uploads/1/3/4/3/134369947/8613197.pdfIn PDF document text
    • https://fatononatigomun.weebly.com/uploads/1/3/4/8/134846471/4695509.pdfIn PDF document text
    • https://debimagobu.weebly.com/uploads/1/3/1/6/131637583/gubolodi-selufil-wobobare-najom.pdfIn PDF document text
    • https://gonadasefu.weebly.com/uploads/1/3/5/3/135345348/genupax.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/rutijan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2450229-66ef-44f0-8efb-8d867fe9e1a8/90626657800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/234b445b-23f6-428e-8a2b-afc661e45f0f/advanced_origami_instructions.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_off00010bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC2 5128 bytes
SHA-256: 2535d62ccf0507432d9e9cd7b094f405c087c1cbc4c05f0e5299bacb8ba1dde4
font_01_sfnt_off00011d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D17 11260 bytes
SHA-256: 2194ce8008be814698f5e6cfdab1ba57bf4a5d572bb68aa6bb478319c1128136

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