Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fa231b32ecd127…

MALICIOUS

PDF

92.6 KB Created: 2021-01-09 04:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 713595d726c5aac77277785d603ea804 SHA-1: ee2542a5b5f1739e7594919c1f091e9147b7949b SHA-256: e5fa231b32ecd127c05b7ee0c332ca056b304ac76749d78b5084779293123bad
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one pointing to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the presence of numerous external links suggests an attempt to redirect the user to malicious content.

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://traffmen.ru/123?utm_term=journal+of+range+management+abbreviation In PDF document text
    • https://bizavewes.weebly.com/uploads/1/3/5/3/135323934/8007316.pdfIn PDF document text
    • https://jamakebowixon.weebly.com/uploads/1/3/4/4/134477175/0be4d309d3ffeef.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/jbhdZJW/88448798893.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/12466615-591b-4bf4-8512-71d3825bab7b/mint_business_news_apk_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ca87a03-0fce-4138-af2b-dbafd21b59bb/adjetivos_para_describir_objetos_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f615e4e-ec24-44b0-a703-f0e41485faa1/cookie_clicker_ascension_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c99bfa1-3923-4380-996c-ef5155fdfe7e/dios_padre_creador_para_colorear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25411f80-0d7e-4c20-a3ba-79df7a650e5a/jebipewisagoxad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5fcb430-7932-44cb-a8d0-c389efc5818b/amor_de_mi_vida_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58ccc275-bbf5-488f-87a8-05afe45765de/38390762380.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7a75fa2-03c8-459f-9c13-ab6a590043e4/seeleys_anatomy_and_physiology_10th_edition_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1f6812-2e52-4abc-b746-b53a09b695d5/xepiraluvinipux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8894f8f4-df57-4141-b2a9-982db927e0d8/donelujaxifoja.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_off00012de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE2 5100 bytes
SHA-256: 634d2ea48e1c825f00a10bcfef6a7c9fcb092cd5d5bb64dba9fd2f528d23f4f9
font_01_sfnt_off00013f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F38 11288 bytes
SHA-256: 8f59df8f0620a680d04397c1f17baa3057143de71767ed14f3a1a8c04627495a

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