Malicious PDF — malware analysis report

Static analysis result for SHA-256 572c7afcd658cae6…

MALICIOUS

PDF

71.4 KB Created: 2021-01-03 09:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: efe8512128228ec34195f87301b427f7 SHA-1: d6c19927e4fec6508a94e80011e04dc1f4b96069 SHA-256: 572c7afcd658cae675c8ceb13e288d2f6e6bfd26dfcb22f15c15d4f3b7ffad52
214 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous links suggests an attempt to redirect users to potentially harmful content.

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
  • 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://gettraff.ru/123?utm_term=rain+tree+flowering+plant In PDF document text
    • https://cdn.sqhk.co/vizinifum/hdhejiX/mr_bullet_unblocked.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/ujeWjgx/sowuxezerexod.pdfIn PDF document text
    • https://vowebaxuzifov.weebly.com/uploads/1/3/0/7/130738870/gaxedo_dupekenu.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/selivuvumepaveb/72404535907.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e314ac3-dabb-44b4-8efe-d4d72dff84db/50_sombras_de_grey_libro_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/cirugia_cardiaca_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/psychological_perspectives_in_teaching.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/12173335062.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/musererokurob.pdfIn PDF document text
    • https://s3.amazonaws.com/rirusozo/pro_forma_income_statement_example.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/animedroid_apk_here.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/16806084200.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_off0000dc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC91 4988 bytes
SHA-256: b7f9acde9a2254f5e783703c027ecc9af99cfb815ca2343532d64221afa7c68e
font_01_sfnt_off0000edbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBB 10356 bytes
SHA-256: fe7aa08bcabb981f3d8b036fc0089f9c5b809f46337e70a717d3b7c62836ac8a

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