Malicious PDF — malware analysis report

Static analysis result for SHA-256 120e89cdec589a1f…

MALICIOUS

PDF

99.1 KB Created: 2020-11-18 13:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 259d9a97cc82a460fc80811923fed3d9 SHA-1: bbbb8ca5639b6c17cc4df6deae01c312e53fa632 SHA-256: 120e89cdec589a1f1dbefbbd7e283643682e791086b7ed0e1027f3ef32bde03f
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one critical heuristic identifying a link to a known malicious redirector. The file also exhibits characteristics of a link farm, suggesting an attempt to generate traffic or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=managing+organizational+behavior+2nd+edition+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_5f92aacd89fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446770/normal_5fb2f019ee926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5f9ecae7e6272.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/dojatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465015/normal_5fa82553c1706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401518/normal_5fa5304089a94.pdfIn PDF document text
    • https://zepitobazelaki.weebly.com/uploads/1/3/4/6/134619491/2783251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402717/normal_5f9186056330f.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/taxomur-zutefe.pdfIn PDF document text
    • https://xujuwole.weebly.com/uploads/1/3/4/3/134378666/4932955.pdfIn PDF document text
    • https://bezebaterizijir.weebly.com/uploads/1/3/1/3/131384714/862dc61dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459467/normal_5faeaa36d5ae8.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/feliso/troubleshooting_guide_for_blown_film_extrusion.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/48494614433.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/puwetimukik.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/share_chat_app_free_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/common_chinese_surnames_word_search_answers.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_off000146c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C5 5512 bytes
SHA-256: e5df1acbad8540fa3256d8c6cb37f51eeea216355d5a5432d4bd01c1fef97d00
font_01_sfnt_off0001599c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599C 11060 bytes
SHA-256: 15abf06328f87c5f288b8ae3ca1538781bf98f48a77a5bd8fbf679527404ce4d

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