Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4f458a8850dc653…

MALICIOUS

PDF

70.8 KB Created: 2020-12-02 10:09:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 27c3b9f50a86f257e6c806b55aae7d61 SHA-1: 3cacd478e4c08a3d0386ec25ca5e6e366da126da SHA-256: d4f458a8850dc6533907756a0261a37129478b4940167f9552670e1451f5f492
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a campaign designed to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=hockey+team+logos PDF link annotation
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/2737601.pdfIn PDF document text
    • https://siwusoxol.weebly.com/uploads/1/3/4/5/134584737/11664.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/vujetevikugejiwezu.pdfIn PDF document text
    • https://xazepobuzu.weebly.com/uploads/1/3/4/5/134582826/1765622c.pdfIn PDF document text
    • https://dunidapakepew.weebly.com/uploads/1/3/4/3/134319263/9856831.pdfIn PDF document text
    • https://zuseluxutiv.weebly.com/uploads/1/3/4/6/134686448/6098476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378383/normal_5f8a92d06e5ad.pdfIn PDF document text
    • https://fisalusul.weebly.com/uploads/1/3/4/3/134341538/gesonunaje-nozaze-xixawi.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/jitugix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403428/normal_5f93a3cbe5ace.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/bubisifapagefe/shape_of_you_song_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/chemical_oxygen_demand_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/achieve3000_answers_day_of_the_dead_barbie.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/xujarozelet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB94 4784 bytes
SHA-256: c7709b4886edb6b83da530f896cfb10a35dc1c29a8bc57a5b642cbcbe23ff19f
font_01_sfnt_off0000dbea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEA 10924 bytes
SHA-256: 749a08eab8cde170364fccdcb789c390b443ed08c31cd69513d96b4c9b3c2d74
font_02_sfnt_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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