Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ebb9a1217d575c7…

MALICIOUS

PDF

81.7 KB Created: 2021-03-14 16:40:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f3de8952f71daad66df23e37c45916e6 SHA-1: a1f63232aae8f0e087eb4dafff80776cd972ca0d SHA-256: 6ebb9a1217d575c70b28c32dba6348b4535f71ac458257a210eb718d9fa0065e
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are likely part of a link farm designed to obscure the primary malicious URL. The primary malicious URL identified is https://xezojetit.ru/strik, which is likely used to deliver a phishing page or a second-stage payload. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/strik?utm_term=short+story+of+the+crucifixion+of+jesus PDF link annotation
    • https://xazefobilizap.weebly.com/uploads/1/3/1/3/131384081/perapigudeporap.pdfIn PDF document text
    • http://goginexoze.22web.org/belisarius_cawl_the_great_work_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470027/normal_602c8ee13cc82.pdfIn PDF document text
    • https://vulopinuvi.weebly.com/uploads/1/3/1/1/131164419/fobolakizoses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393508/normal_5fd0a642f1886.pdfIn PDF document text
    • https://finijigif.weebly.com/uploads/1/3/2/6/132681422/muraxelagoxu.pdfIn PDF document text
    • http://datekal.22web.org/vuvarimukorekifosibijow.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
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_ec49e1ac49114484b3cb546bd58b1441.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fopalew/ano_ang_cuneiform_tablet_tagalog.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/libros_budismo_tibetano.pdfIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_c7f5f558c9d7491798eafa51e6774d58.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/nice_guidelines_dementia_quick_reference.pdfIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_2ebafa02b89e4937bcce7e41722daa93.pdf?index=trueIn PDF document text
    • http://nabapuxamiluj.epizy.com/xuxozin.pdfIn PDF document text
    • https://1c92f6d8-19eb-429c-9239-1cf6be91372f.filesusr.com/ugd/cc1a03_43536be899ba4fa69b1ba87d49478d91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/noxxa_breadmaker_manual.pdfIn PDF document text
    • http://sapakebozo.rf.gd/anatomic_pathology_laboratory_information_systems_a_review.pdfIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_18a70ea711df4fb39005d018d03f0a80.pdf?index=trueIn PDF document text
    • http://riboparewi.rf.gd/jokopesudat.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/pajokuguxagudikuxojotun.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_d9f2415024424ae7b1528ef4eab981a4.pdf?index=trueIn 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_off0000f354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF354 4956 bytes
SHA-256: 82cd16cd44f269295119d9f6f2a89d5c381671c3b1fa5d66ac7f30403824328d
font_01_sfnt_off0001043d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043D 10748 bytes
SHA-256: 7ca577dc07faa9ed0f0a3404720ebd1386dead85abae665f66b7304fe8f1337f
font_02_sfnt_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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