Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e92522867870536…

MALICIOUS

PDF

114.2 KB Created: 2021-05-22 03:27:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 828c8d2375780d64bee613c3a9806b2a SHA-1: d6b6d3b0bc971602377fd3c73046aeab3ea446be SHA-256: 4e925228678705362353f05522972e9f32a56c0e6cfab05e43c07cb6bf50e696
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

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
  • 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/strik?utm_term=andr%25C3%25A9s+cazares+volver+con+ella+pdf+gratis PDF link annotation
    • https://bunekapizo.weebly.com/uploads/1/3/0/9/130969144/pijudize.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_601d19e374312.pdfIn PDF document text
    • https://tesetugunujogub.weebly.com/uploads/1/3/4/0/134040467/xupisajoza.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/wovolo.pdfIn PDF document text
    • https://susulipazelavig.weebly.com/uploads/1/3/5/3/135335994/9172018.pdfIn PDF document text
    • https://zujuwaxi.weebly.com/uploads/1/3/5/3/135307850/vazigixufatadelogo.pdfIn PDF document text
    • https://bekajujoxofutit.weebly.com/uploads/1/3/1/4/131406668/a4950e1.pdfIn PDF document text
    • https://gatelixepa.weebly.com/uploads/1/3/1/1/131163507/5868813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484115/normal_602b7b0356a57.pdfIn PDF document text
    • https://nituxokijawagez.weebly.com/uploads/1/3/0/9/130969825/ee9dd36b8e83.pdfIn PDF document text
    • https://jumuvive.weebly.com/uploads/1/3/0/7/130776409/xazotevaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384029/normal_6040a7145086e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420934/normal_5fd88146c764b.pdfIn PDF document text
    • https://funopazotasar.weebly.com/uploads/1/3/1/0/131070342/mudosopodudised_vupowevoguzed_nasad.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/a850f4d6-2e45-4c8d-bd9e-91474e14dff1/arduino_assembly_language_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/fallout_4_mod_creation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/muzoravavex.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/the_revenant_full_movie_download_in_hindi_hd_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/13379370935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b993f5f-1aaf-49ef-ae7e-231fe57211a9/leravotabixesiwod.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_off00017dea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DEA 5564 bytes
SHA-256: 23164dda2e328f07f4d6bb053e2c860e874a777ba13d7be1099bb3551011b2b4
font_01_sfnt_off000190b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190B5 12520 bytes
SHA-256: 94e0dacf2530ced70ac6b9eef06a04f1316579c898abd24515ad0015604eb7fc

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