Malicious PDF — malware analysis report

Static analysis result for SHA-256 332f4c68710b5644…

MALICIOUS

PDF

76.5 KB Created: 2020-11-18 13:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f0e3e761408c0bb7ca43173f4d135445 SHA-1: 180c414ef1c03bc2fe61231b16d8494d998dde2f SHA-256: 332f4c68710b56441047c8b2ccd8edae5c8a0ea0de019f04eae1f45b1976e364
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files with numeric slugs, indicative of a link farm or SEO manipulation. The primary URL, 'https://trafftec.ru/strik?utm_term=ejercicios+de+multiplicacion+y+division+de+polinomios', suggests a lure related to educational content. While no scripts were explicitly extracted, the PDF structure and numerous external links strongly suggest malicious intent, likely to redirect users to malicious websites or phishing pages.

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://trafftec.ru/strik?utm_term=ejercicios+de+multiplicacion+y+division+de+polinomios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382192/normal_5fa71e3dc2608.pdfIn PDF document text
    • https://lanulizuxuja.weebly.com/uploads/1/3/4/6/134658029/nozakewi-wonapuvimef-wefofaveseloz-wonesa.pdfIn PDF document text
    • https://pafuwaron.weebly.com/uploads/1/3/4/3/134385690/takijiju.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/waniwijalakobi.pdfIn PDF document text
    • https://boduburul.weebly.com/uploads/1/3/4/6/134654649/d055fbe1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5fa1097a2144d.pdfIn PDF document text
    • https://voxepobar.weebly.com/uploads/1/3/4/6/134668427/zonevekaxu-sofevebu-rumozu-gonejosilikuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_5f947b66e3947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_5fa358df9740b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f89dbcb74cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8c1cc403b3e.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://s3.amazonaws.com/donake/pelipozoxikezigirifeses.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/1507469232.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/ross_university_school_of_veterinary_medicine_ranking.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0F 5140 bytes
SHA-256: cff653184b8ef505dc99303c17cb4bfa598eda66e22d13ac44ea66fa273ad42e
font_01_sfnt_off0000dfe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE9 5296 bytes
SHA-256: 537b3538734aba339dc3b0c865d9ec2cc30ed770124707c752022a38c76356eb
font_02_sfnt_off0000f1db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1DB 11176 bytes
SHA-256: cbfa960b8f175a3d6a350195c2de353e00bc862c0332ce9fb9e2c1edb213769e
font_03_sfnt_off00011623.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11623 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.