Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c1c9322a3c444c4…

MALICIOUS

PDF

70.6 KB Created: 2021-02-09 10:05:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 029cb004d1e16a33cb8043ceb168cf59 SHA-1: 615641c7884983660fda49bec41de820bfaae8e9 SHA-256: 5c1c9322a3c444c4a4ec521347784311e2eb971fc08222325a7de085e4487038
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a search result for a common query. This suggests a phishing or social engineering attempt to direct users to malicious infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a further payload or lead to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wb?keyword=conditional%20formatting%20based%20on%20date%20google%20sheets In PDF document text
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/nikigiw_pajaripidi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427783/normal_5fd0391e5ee53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482215/normal_5ffc707196650.pdfIn PDF document text
    • https://diwesosun.weebly.com/uploads/1/3/2/6/132695938/tapitoluwefew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484820/normal_5ff03e1ced91e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367960/normal_5ff2afde6312e.pdfIn PDF document text
    • https://zopodiwozexuma.weebly.com/uploads/1/3/4/7/134737972/9813495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455194/normal_5feaedc7b28d2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://miwofalixi.rf.gd/40261130805.pdfIn PDF document text
    • http://wuwatomugexove.epizy.com/vujiwelowokunezuriganewa.pdfIn PDF document text
    • http://fagorawed.rf.gd/simple_professional_presentation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/9430439568.pdfIn PDF document text
    • http://birotizedu.epizy.com/43164339624.pdfIn PDF document text
    • http://kelamivajaw.rf.gd/30216640902.pdfIn PDF document text
    • http://nitasoginit.rf.gd/because_i_am_happy_song.pdfIn PDF document text
    • http://zakusomob.rf.gd/cad_model_sites.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/wilozemomuwudit.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/a_o_smith_hybrid_water_heater_manual.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_off0000d908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD908 5364 bytes
SHA-256: af7795a7ac07799c9fda088abcd76a51c5cb093608abcc4811084c02052c309c
font_01_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 9956 bytes
SHA-256: aee63d34267c502c0c13dc2c11b958c22b6faa1194f0064fad351c3d6d677ae4

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