Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca671d7b24546e28…

MALICIOUS

PDF

73.4 KB Created: 2021-02-17 23:10:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0882498c7568d6639a71e3fd305d0fe4 SHA-1: cabbc8882ece8da80ad5d97f8e58cd794eb3a50d SHA-256: ca671d7b24546e28973cc06696ddef1efbb24b7a92f5f729b7932f12d2b19d66
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or SEO manipulation. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=order+and+chaos+online+leveling+guide PDF link annotation
    • https://vipukawolatu.weebly.com/uploads/1/3/4/4/134486161/5755272.pdfIn PDF document text
    • https://fazolusafiwef.weebly.com/uploads/1/3/4/5/134585025/pefumidijup_damutuwufaru.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467274/normal_5fcef34a8c6a6.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/ijgiaib/clueless_tv_show.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413865/normal_5fd2df7a6cf96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_60153959459bc.pdfIn PDF document text
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/vakapurakumalebabup.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/ahfpibj/consolidated_theatres_kahala_movie_times.pdfIn PDF document text
    • https://zoxiniguve.weebly.com/uploads/1/3/4/5/134584112/915645.pdfIn PDF document text
    • https://rulafowobunafo.weebly.com/uploads/1/3/5/3/135391395/1625779.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/e4e7d44660.pdfIn PDF document text
    • https://mikezibe.weebly.com/uploads/1/3/1/4/131453119/tovefidolemasim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_5fd0b777ac7c0.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/hFgcgeq/54879653624.pdfIn PDF document text
    • https://gexuguxibam.weebly.com/uploads/1/3/2/6/132696321/3258823.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/ruzinifega.pdfIn PDF document text
    • https://cdn.sqhk.co/wowixepis/gghi1if/30033697345.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/gagotaniwipure/nuroj.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/38959627230.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/zaxazigikonegupetuponu.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/duniminefisiku.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_off0000e1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A6 5288 bytes
SHA-256: 258e06adb977b3023bd79222af93a6e0ffbb80937b8f6a104885eae46c3f35ef
font_01_sfnt_off0000f39e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 10632 bytes
SHA-256: 110dbf9d2ed9950017d8d6f30d7af75362b291d83fb7d14e5109cd031f330b10

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