Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4a3c0cef47b072…

MALICIOUS

PDF

73.1 KB Created: 2021-05-19 18:55:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a28c9656fd1ce0878f706ba75c461f0e SHA-1: f78d4378f912054c6856ceed4ac916f47c75cba2 SHA-256: 3b4a3c0cef47b072c94962bd80cef3a58fe0cd5b3b219cafff6324eb37955fa8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL 'https://leonvi.ru/strik?utm_term=what+are+the+solutions+for+plastic+pollution' suggests a lure related to environmental topics to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=what+are+the+solutions+for+plastic+pollution PDF link annotation
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/mexavira.pdfIn PDF document text
    • https://numokafi.weebly.com/uploads/1/3/2/6/132695525/d95d9b19e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_6053c3625e5f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486374/normal_5fc59557f130c.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/1398197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478655/normal_60160d08205d9.pdfIn PDF document text
    • https://kukedinuril.weebly.com/uploads/1/3/5/3/135326584/dusijulovaz-xunozozore-duvuboxixavax-jinazirod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2822c90f-d100-4b88-89b1-5e563eaf8449/partituras_del_coro_lldm.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/which_is_best_microbiology_or_mlt.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/brain_teasers_fun_sheets_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59765841-8047-452c-8b9d-67173efef48b/oracle_sql_substr_in_where_clause.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/arabic_english_bible_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/adverb_clause_worksheet_for_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/ite_checkpoint_exam_answers_2017.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_off0000e33e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33E 5116 bytes
SHA-256: 1ff562ac1c711fcfd4c425c8617ec6c3fc7df2e144aa65896b4fe7c9143ab8c3
font_01_sfnt_off0000f4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AE 10216 bytes
SHA-256: 5eb88809403d41253d92c0be62e62c0f3cf35e8bad6d43c82650b7ebb3eef157

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