Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ece38b02ea46792…

MALICIOUS

PDF

77.5 KB Created: 2021-03-06 16:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 02f0d757db7e16dddb9c7d483b0f086c SHA-1: 0f329569354eb51a451dbc3306fb6a3476fc507f SHA-256: 3ece38b02ea46792291d4788d4a1f19f44c649c77ff8124481f750dca06dec3e
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/123?utm_term=how+to+eat+yourself+healthy+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5ff6b33dae72d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_6006ae4ccd456.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450746/normal_5fee1b3224e8e.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/8480800.pdfIn PDF document text
    • https://puxodemidumez.weebly.com/uploads/1/3/5/3/135345879/jumexuraxej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_6020d59dba9a4.pdfIn PDF document text
    • http://kelirifuwa.22web.org/basic_english_grammar_course_online.pdfIn PDF document text
    • https://sajozigita.weebly.com/uploads/1/3/0/8/130814351/jafaliwod.pdfIn PDF document text
    • https://dawipufa.weebly.com/uploads/1/3/3/9/133986453/zofezuluvalepu-nofiw-lelulitukomasan.pdfIn PDF document text
    • https://xirovule.weebly.com/uploads/1/3/4/7/134749068/8798f1f7ecc106e.pdfIn PDF document text
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/fisoxonabos.pdfIn PDF document text
    • https://givunanisu.weebly.com/uploads/1/3/4/8/134848628/9104403.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/5629093.pdfIn PDF document text
    • https://kivogumit.weebly.com/uploads/1/3/1/0/131070776/7775309.pdfIn PDF document text
    • https://malosopiwa.weebly.com/uploads/1/3/2/6/132695478/melok.pdfIn PDF document text
    • https://beritugemob.weebly.com/uploads/1/3/4/3/134332724/5713462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_60168a2cc528c.pdfIn PDF document text
    • https://wadikojororewu.weebly.com/uploads/1/3/1/3/131398286/64ed23f.pdfIn PDF document text
    • https://xabetidadema.weebly.com/uploads/1/3/1/3/131398123/gelefujuzugajup_nawagosapudukof_safatapoginu.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
    • http://bewidiri.rf.gd/65423772388.pdfIn PDF document text
    • http://fotizerenodafik.epizy.com/beautiful_liar_mp4.pdfIn PDF document text
    • http://jezedor.epizy.com/pillars_of_eternity_steam_class_guide.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_off0000e6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6ED 4940 bytes
SHA-256: 84d7d0e84092ad69d37373e5c6bc4747f30edaf6b16979cfd90e638caab92dba
font_01_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 10152 bytes
SHA-256: 27cb159140c2eb52715d317168ab5f62e56c8f44930e115363b805996a75c306
font_02_sfnt_off00011a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A90 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f