Malicious PDF — malware analysis report

Static analysis result for SHA-256 562c44c981499632…

MALICIOUS

PDF

78.7 KB Created: 2021-02-08 12:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 02cfb372ba7a8b43deda2792b2515b88 SHA-1: f7097eb7d5c3a30c0ec27770ad48ed66ab504325 SHA-256: 562c44c9814996329cb959b3dabf5fad2241e8ed3f694f63d8e635894e9d3507
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a search result for a seemingly innocuous query. This URL, 'https://baarspo.ru/wb?keyword=printable%20sugar%20sheets%20near%20me', is likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://baarspo.ru/wb?keyword=printable%20sugar%20sheets%20near%20me PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5fe2eeae0b5b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5fc9a862ab9ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486045/normal_5fcc29433585a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444110/normal_6012289eebe74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_6017156eb3807.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5fecc419dba1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_5fc987c3277d3.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/kawotexulozax/83969866734.pdfIn PDF document text
    • http://zenowalu.rf.gd/biochemistry_lehninger.pdfIn PDF document text
    • http://dimegebewode.epizy.com/formal_email_job_application.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/chronicle_display_black_font_free.pdfIn PDF document text
    • http://gutumafik.epizy.com/android_auf_samsung_tv_streamen.pdfIn PDF document text
    • http://tejovixija.rf.gd/coordinate_system_transformation_translation_and_rotation.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_off0000f8bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BC 5240 bytes
SHA-256: a528ffd417307a9f61b8df287f0ef2e5c04a3f09ff15293918a171fb8be832ec
font_01_sfnt_off00010a59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A59 10556 bytes
SHA-256: 7dbdbecc676967fe75af15a18bb232136ac4e96b13a8387fb4499bfd6ce1c8f8

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