Malicious PDF — malware analysis report

Static analysis result for SHA-256 867c0757fa93c4e8…

MALICIOUS

PDF

65.0 KB Created: 2020-11-24 02:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5fb4eb0d6e71a8e48089af786ebe6cf9 SHA-1: 113664217d8706edb0c21ae3bf76b21be6ebc6a4 SHA-256: 867c0757fa93c4e805ee4a3369de35e90e8df8f3f721b8aec481e691508def96
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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://trafffi.ru/strik?utm_term=bruce+lee+the+man+only+i+knew+movie PDF link annotation
    • https://ranaxeli.weebly.com/uploads/1/3/4/4/134478161/jagise-kusoja-vulujivazovevav-sujajo.pdfIn PDF document text
    • https://vifepupu.weebly.com/uploads/1/3/4/8/134886621/9314585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423137/normal_5f9b7c31af75e.pdfIn PDF document text
    • https://wozofawado.weebly.com/uploads/1/3/0/8/130874325/koduwonovibowo_zubeve_mabadezum_jabomez.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/xuliresujaxufur.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/lunojol/aswc_1_vehicle_instructions.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/wamatibud.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/98667662623.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/peliculas_de_disney_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/tidatisepepukuxesub.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/suit_jacket_dress_missguided.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/loi_sur_l_amnagement_du_territoire_vaud.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/parallelism_worksheet_with_answer_key.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_off0000c142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC142 5228 bytes
SHA-256: bda96ea7e107df591e3478538ba431904992bc6996a2c734c6cdcc442559d9b8
font_01_sfnt_off0000d2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F8 10496 bytes
SHA-256: 146cb86fec9f094ab8d3cb0bbce6bb6505fde9ceb5ae7ee1d096046222f9aa52

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