Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc725dffadde4b8…

MALICIOUS

PDF

78.1 KB Created: 2021-02-26 04:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 56f368c147409bbec9031838f32836c8 SHA-1: 55512f3b9e3d736eb94c7d1cae230c80f5dae19b SHA-256: 4cc725dffadde4b82efd216fa1f8c1129b0806f890185e01fa484fb460b58a9b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though heavily obfuscated, appears to contain text related to learning the bible, likely as a lure. The presence of numerous external links suggests an attempt to direct the user to malicious infrastructure for further exploitation or phishing.

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
  • 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.
  • 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.
  • 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/strik?utm_term=what+is+the+best+way+to+learn+the+bible+for+beginners In PDF document text
    • https://jegiwagoxupida.weebly.com/uploads/1/3/1/3/131379361/6097390.pdfIn PDF document text
    • https://fazebepipetuko.weebly.com/uploads/1/3/1/3/131384618/f7585bd1ad39c86.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/DS5gcih/60289905600.pdfIn PDF document text
    • https://cdn.sqhk.co/rogokivika/ijquljh/1055_heron_circle_joliet_il.pdfIn PDF document text
    • https://cdn.sqhk.co/fegibowaxus/cZDigjv/61071619490.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/balefudopidiwu-zamulavujov-sesegob.pdfIn PDF document text
    • https://fizokufewof.weebly.com/uploads/1/3/4/0/134096090/b200a.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/mubemutolewe/medela_manual_breast_pump_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/ccna_voice_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/67702059029.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/everything_at_once_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/70968067055.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/mizijekotazipipafa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/45104704780.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/free_blank_bookmark_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/siluvezowosir.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/99825063882.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/48819638376.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/40280426194.pdfIn PDF document text
    • https://s3.amazonaws.com/memobofilenabon/argumentative_and_persuasive_essay_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/frontline_commando_game_free.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/hospitality_degree_worksheet_unlv.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_off0000f395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF395 5376 bytes
SHA-256: 90626780ffc8f7fe71b0ab96023c93a7c61d30a3ec8f84b20f9744b3ae5cc9a1
font_01_sfnt_off000105f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F8 10872 bytes
SHA-256: d3db74e69459e1195adf8b12530dd1be96fcefb7d7b6b28de7b2715c7cb556a7

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