Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3280eeddd22131f…

MALICIOUS

PDF

87.6 KB Created: 2021-05-17 22:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fdf3b2fdeb0faa4943625236af163029 SHA-1: 53f42f2a96a7eec4d31485b730b40eb50497d5fe SHA-256: c3280eeddd22131f923748a02de81004f4bdbc710ea3bf53320b4460a846b019
186 Risk Score

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 0.9947

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
  • 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://resalured.ru/strik?utm_term=pokemon+sacred+gold+%2528hack%2529+nds+rom+download PDF link annotation
    • http://dofuluxaruze.22web.org/bunejevegigamuwinigag.pdfIn PDF document text
    • https://kazumole.weebly.com/uploads/1/3/1/4/131454435/nonuve_tifodabak.pdfIn PDF document text
    • https://zusabave.weebly.com/uploads/1/3/1/4/131406295/gofumuzozisor.pdfIn PDF document text
    • https://fajevubesupuvax.weebly.com/uploads/1/3/5/3/135387480/bofunuzugobos-vinurin-pabide.pdfIn PDF document text
    • https://zififawatef.weebly.com/uploads/1/3/4/3/134384507/wasex-luweramis-zejojon.pdfIn PDF document text
    • https://nokabukewodujam.weebly.com/uploads/1/3/0/9/130969525/1644530.pdfIn PDF document text
    • https://gatokoliza.weebly.com/uploads/1/3/0/7/130739470/4958956.pdfIn PDF document text
    • https://xupubiwe.weebly.com/uploads/1/3/4/3/134339906/111daf.pdfIn PDF document text
    • https://sizelelam.weebly.com/uploads/1/3/4/8/134867910/691e5.pdfIn PDF document text
    • https://wobipogipexiwom.weebly.com/uploads/1/3/1/0/131070125/5209127.pdfIn PDF document text
    • https://sozezitevi.weebly.com/uploads/1/3/4/6/134639304/niwafadiro.pdfIn PDF document text
    • http://topikufovumedar.iblogger.org/koradexelu.pdfIn PDF document text
    • https://diruwogedow.weebly.com/uploads/1/3/1/3/131382439/bc01b138b755.pdfIn PDF document text
    • https://vokinojen.weebly.com/uploads/1/3/4/8/134851280/1534918.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/ruxumuge-pinatomajifo-dilorezivol-zozud.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/5785820.pdfIn PDF document text
    • http://dibowofu.22web.org/as_time_goes_by_tv_series.pdfIn PDF document text
    • http://jelonosax.iblogger.org/patanjali_ayurvedic_medicine_book.pdfIn PDF document text
    • https://warevinigipa.weebly.com/uploads/1/3/4/8/134898994/diwivomad.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/ginutu/acid_rain_information_center.pdfIn PDF document text
    • http://bijasubibivov.rf.gd/simplifying_polynomials_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/xxi_cinema_songs.pdfIn PDF document text
    • http://viveguwoxifug.epizy.com/brokering_peace_in_nuclear_environments_download.pdfIn PDF document text
    • http://rezexoguseg.epizy.com/how_to_apply_code_formatter_in_eclipse.pdfIn PDF document text
    • http://pimodogeziwasu.rf.gd/acute_renal_failure_2020.pdfIn PDF document text
    • http://vuzajakexe.epizy.com/vbspu_exam_form_last_date_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/social_learning_theories_help_us_understand_that.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_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 4460 bytes
SHA-256: b0c505c3c38c5f87cae08b540f106042d36ad882b0a4da176ebe2b526c6da8cb
font_01_sfnt_off00010b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3D 5664 bytes
SHA-256: ec13344cb9b8754095828f99ee9b8eda538caed21a874be4a2c4e1fceb462ac3
font_02_sfnt_off00011e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E80 15296 bytes
SHA-256: c132caa390f2c0ab1e81e234d38fda4a9e17e1043794f4315512ada6b8f5b4d9