Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d418852d2d6a59a…

MALICIOUS

PDF

74.3 KB Created: 2021-04-06 21:21:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 09a9712d3a62fb9ff36d0c446a57f448 SHA-1: 4c098751506d46761a027d8a07a270893ee28198 SHA-256: 4d418852d2d6a59a74aa1ed2ab8c1fedcd41c06f2e2b2a75edb1a348bae11bbe
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to malicious or deceptive content.

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://kuzutuzo.ru/strik?utm_term=weider+pro+9940+home+gym PDF link annotation
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/donejerofosa_getuxataxuvi_mawesut.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/hdmAqrl/70767515136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_6017189b60405.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5fdb210f61f0d.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/6zjixLT/basic_proportionality_theorem_worksheet.pdfIn PDF document text
    • https://gumosoxegobekij.weebly.com/uploads/1/3/3/9/133999275/rekokuden.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/e5MjesX/tripp_trapp_baby_set_white_wash.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/3429132.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/bOgcXjb/nesajomukobuji.pdfIn PDF document text
    • https://cdn.sqhk.co/puxezuxivas/h68idUK/band_apparel_websites.pdfIn PDF document text
    • https://sawepaxir.weebly.com/uploads/1/3/1/8/131858353/ba103964ca583.pdfIn PDF document text
    • https://tupisefam.weebly.com/uploads/1/3/1/3/131383837/03c47cf3c.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/hieieXj/86645000693.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/35e2b007-970e-492c-8345-1c18d7c1d001/xesedeno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed6b2986-9cd4-4ff9-aff8-6d74ff25fa92/gemoramakomelofore.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_off0000e3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DC 5456 bytes
SHA-256: c0cd47b28aa199b8b63a09f11d253d2aeb2b81005ec8892ee53da582303cad10
font_01_sfnt_off0000f65f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65F 10660 bytes
SHA-256: d410d932a495673cb8f5c67a608a6001f6d080d2e234e899798d1c78e72cbde6

Open this report in the interactive analyzer, or submit your own file for analysis.