Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cec7eca7a90fa5e…

MALICIOUS

PDF

75.6 KB Created: 2021-02-19 06:24:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: b40a5a8473cf9a0ab194baa1d837b162 SHA-1: 909c80275239f963eaf4e0ec4c11224c1910ab94 SHA-256: 0cec7eca7a90fa5e4127dcbf0428c769c8dc84cd41a84a1c5cc29df5f6467d48
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicative of a link farm or phishing campaign, with one URL specifically mentioning 'blank periodic table worksheet' in its query parameters. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://leonvi.ru/wix?keyword=blank+periodic+table+worksheet PDF link annotation
    • https://lutomired.weebly.com/uploads/1/3/5/3/135316507/ea9cf56c28a1b4.pdfIn PDF document text
    • http://ighelpcenter.xyz/22941781098dv9ip.pdfIn PDF document text
    • http://clubstore.pro/440516068352i8ns.pdfIn PDF document text
    • http://wtia.space/zuxamutozorisinawebiff2s9e.pdfIn PDF document text
    • http://blog-millionaire.buzz/traveller_magazinexci61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386594/normal_6012c4d0d764e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480878/normal_5ffe2969237e2.pdfIn PDF document text
    • https://fasipibopokele.weebly.com/uploads/1/3/6/0/136096953/1232978.pdfIn PDF document text
    • http://wejewirivi.iblogger.org/libro_de_fisica_fundamental_tercero_basico_mario_samuel_fernandez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_601424c8ca28d.pdfIn PDF document text
    • http://rusakova.space/606380509212aa0i.pdfIn PDF document text
    • https://raxipufed.weebly.com/uploads/1/3/4/4/134474150/4056982.pdfIn PDF document text
    • https://nuxinipimop.weebly.com/uploads/1/3/2/6/132682773/607166.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500183/normal_5fd68b5c88f6a.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/dabatisew/furukav.pdfIn PDF document text
    • https://s3.amazonaws.com/sogovekevi/sebipoganesib.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/nupagor.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/4108643396.pdfIn PDF document text
    • http://bixifededas.rf.gd/accept_meeting_request_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/33016176709.pdfIn PDF document text
    • http://suzowow.rf.gd/sap_crystal_reports_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/non_compliance_audit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/afsana_pyar_ka_songs_free.pdfIn PDF document text
    • http://junigafef.epizy.com/fupekotipawofejep.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_off0000eaa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA4 5504 bytes
SHA-256: 8157cf94e24a93ba2a8072508da18fc9d218829cfacff9ab4d439f2bf924fb41
font_01_sfnt_off0000fd60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD60 10328 bytes
SHA-256: a38821fcde429efa953102a6264384146a6831d4fc05eb7090adec59dc444ade

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