Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ca4241110b7107…

MALICIOUS

PDF

80.7 KB Created: 2021-05-24 23:26:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: af079974d3c8980b5fbd55032d802827 SHA-1: e6429957e72e536a7c2e1db0f9a661d0b3f55695 SHA-256: 06ca4241110b7107d57ebc6bc08a30b2520b3fd07184d928874e1a0f99096ae1
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing or distributing malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting a malicious intent to redirect users to potentially harmful sites. The ClamAV detection and ML classifier further support its malicious nature, likely serving as a lure for users interested in computer operating systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=sistema+operativo+de+una+computadora+tipos+y+funciones PDF link annotation
    • https://ralunudedosamot.weebly.com/uploads/1/3/4/8/134856058/413582.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/28d53734.pdfIn PDF document text
    • https://zigikarorusoto.weebly.com/uploads/1/3/5/3/135351373/77463e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443354/normal_5ff4898b12317.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/556090.pdfIn PDF document text
    • https://vewefididijos.weebly.com/uploads/1/3/4/5/134517371/8815108.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501993/normal_5fd08e2514899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_6064927420bad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fd218f52fb73.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375518/normal_5fcb70652c7e6.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/jupinadidewufuk_luxegukunaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_6067e25989b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_602d0ebf564cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485149/normal_5ff4515425cf3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fca4964aff0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495271/normal_5fdf2a89e93c1.pdfIn PDF document text
    • https://moxamegok.weebly.com/uploads/1/3/3/9/133999551/3a1a93f089c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488570/normal_60182c2649912.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5ff579d0ba58e.pdfIn PDF document text
    • https://duxotitur.weebly.com/uploads/1/3/4/5/134596147/ae98185e62105a.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
    • 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_off0000ed43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED43 5416 bytes
SHA-256: 4401146f9cfc61365e5f6c7b85601a8ad0bf96b7be97fe63c6078334b83168cf
font_01_sfnt_off0000ff99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF99 12024 bytes
SHA-256: 28a15cf2cf17c9b4ea0e06c4694d1dea6b75b0e61a023f8a45547d8fb813e005
font_02_sfnt_off000126c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C0 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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