Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0d6d766207840b…

MALICIOUS

PDF

76.4 KB Created: 2021-04-01 04:11:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 51b2d722a38d60cc19d8008b7e6ed6c4 SHA-1: 47de64dccc9c622bfccafb917cf89cbafad57140 SHA-256: 2c0d6d766207840b6efbd4c79a9e10b2c653864f13b544fe73ea9fe02616bab5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a domain associated with malicious activity, as indicated by heuristic firings and ClamAV detection. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of an external URI and the ML classifier's high confidence score point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/wix?keyword=parent+functions+worksheet+algebra+2+answers PDF link annotation
    • http://kujapirewavis.iblogger.org/larit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484636/normal_5fdbb7fb53853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384295/normal_601fb39fe5e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474191/normal_604e68229a151.pdfIn PDF document text
    • http://blognews.top/gas_laws_formulas_sheeto8jh6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366398/normal_5fe3d57e223f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_601431800060e.pdfIn PDF document text
    • http://bodyita.space/befajasuzonasanilavina0mkum.pdfIn PDF document text
    • http://rentline.pro/34917976140i032i.pdfIn PDF document text
    • http://filexupop.iblogger.org/zipudubabuvapaputeg.pdfIn PDF document text
    • http://buliwomof.22web.org/past_simple_all_forms_worksheet.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/janodojivi/jebonunedimugugijoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/41582797756.pdfIn PDF document text
    • http://sonamako.rf.gd/wugatemavib.pdfIn PDF document text
    • http://lamifamolobigos.rf.gd/58527812528.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/perfect_strangers_2017_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/english_language_esl_grammar_quizzes_for_students.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/color_smoke_png_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/audio-technica_at-lp120-usb_speakers.pdfIn PDF document text
    • http://muxolisakij.epizy.com/mexezujezafegolinegiliru.pdfIn PDF document text
    • http://mibofive.epizy.com/lepekupiw.pdfIn PDF document text
    • http://romutipi.rf.gd/melilafuzoxipudosunale.pdfIn PDF document text
    • http://zesubilav.epizy.com/31656234154.pdfIn PDF document text
    • http://koxogulu.rf.gd/jexukosodonakem.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/59227594676.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/kebidogenogifawuxegaxus.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_off0000ea4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA4B 5572 bytes
SHA-256: 544fdc233118cb6678ccf3cab90bbfac055eb88b59e8e49cfe7162ae757503df
font_01_sfnt_off0000fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5A 10664 bytes
SHA-256: bbf8a506b1671f9545be3147aa602702f70697fc504e31130ae8a647f8758c93

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