Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0676ce01d0e126b…

MALICIOUS

PDF

113.8 KB Created: 2021-03-10 16:31:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9880ebd37e51b53cad41eb561d482670 SHA-1: bdf97656c99f0c606ae78b8f4917ba44e01cfc1f SHA-256: d0676ce01d0e126b76605596d5ad568b15160ac1195d33eb8f775547d36615fd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=de+que+trata+el+libro+la+ciudad+y+los+perros PDF link annotation
    • http://megatorg.ru/xepesegezawitikqtb4.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/3870079.pdfIn PDF document text
    • http://lazadacostumercenter.com/womebemubafogur44k1s.pdfIn PDF document text
    • http://good-production9.site/lisaxesidefud6ag9t.pdfIn PDF document text
    • http://baffer-shop.space/bom_radar_brisbane_64f0swy.pdfIn PDF document text
    • http://hookup682.site/personajes_del_hobbit_la_desolacion_de_smaug00mw5.pdfIn PDF document text
    • http://trixy-matrix.space/14632517114izwft.pdfIn PDF document text
    • http://nipugupaf.22web.org/kusotagelaninik.pdfIn PDF document text
    • https://wezifujizofuji.weebly.com/uploads/1/3/4/9/134904593/bewumegikakunodorezu.pdfIn PDF document text
    • http://likelid.xyz/advanced_trauma_life_support_guidelines_pptbjxkl.pdfIn PDF document text
    • http://lnstagramsupportinfo.com/basic_multivariable_calculus3uf4m.pdfIn PDF document text
    • https://xuxulavadimuxa.weebly.com/uploads/1/3/4/2/134234789/5353264.pdfIn PDF document text
    • https://sozefusezat.weebly.com/uploads/1/3/4/8/134860931/f1d6c0f.pdfIn PDF document text
    • https://rezawefid.weebly.com/uploads/1/3/5/9/135978206/3881682.pdfIn PDF document text
    • http://tryici.xyz/femagadenenilawolumu0z1p1.pdfIn PDF document text
    • http://leadtop.co/the_chronicles_of_narnia_prince_caspian_full_movie_dailymotion_part_80373h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://aed022ca-8a9d-452d-9022-56a74a585a14.filesusr.com/ugd/4d548e_a6a24919b1b5478aa4a34765e64f96e7.pdf?index=trueIn PDF document text
    • http://zonisitis.rf.gd/hack_bitcoin_miner_android.pdfIn PDF document text
    • https://5d3a357a-25b2-4459-9cd8-210b235f7b36.filesusr.com/ugd/45e30f_0a82aebab5624cf6a688ee88b7e8d93d.pdf?index=trueIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_62976a7ad8ee4f76806d79dcda4ed8ff.pdf?index=trueIn PDF document text
    • http://vufosal.rf.gd/38191086874.pdfIn PDF document text
    • http://fofuxolisemaxim.epizy.com/vugasogugiriwilegevu.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_off00016f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F61 5212 bytes
SHA-256: 412aa7a50681907bc85be60c1c8dfed10d7a164b9d649e844d7b375b3f113521
font_01_sfnt_off00018129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18129 12528 bytes
SHA-256: f719db1b772b00535b0e4d5bd22b910f9aad7b3e6e7d9e1f1328b23fb9b5d5a3
font_02_sfnt_off0001a976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A976 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34