Malicious PDF — malware analysis report

Static analysis result for SHA-256 46563f4e2ccf4073…

MALICIOUS

PDF

76.6 KB Created: 2021-04-10 12:27:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e9006381595bab387551b2973b5ba718 SHA-1: 0526537801fcbf54a0128acffbffa1f14d16d866 SHA-256: 46563f4e2ccf4073d5eb63501df9c1991712a27b5dd2347d6029b614be633d5b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs point to sites that likely host malicious content or phishing pages, aiming to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/strik?utm_term=cbse+class+12+physics+chapter+4+ncert+solutions+pdf PDF link annotation
    • https://falopizesolirod.weebly.com/uploads/1/3/1/3/131379111/0263a208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488580/normal_603263479c7ca.pdfIn PDF document text
    • https://wudemivezetuf.weebly.com/uploads/1/3/4/3/134318680/10a5503fa7fb44.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/f0e953c89.pdfIn PDF document text
    • http://bikokobolo.sportsontheweb.net/48431161308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410016/normal_604dc126bcfdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fe86759d4719.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/criterios_de_ranson_pancreatitis_aguda.pdfIn PDF document text
    • https://vujirazezada.weebly.com/uploads/1/3/2/6/132681664/7d8800227b43e82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471969/normal_604d1f068b6b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383801/normal_605050efb5cd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482638/normal_604130aef3bec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_603fca9ccfbbc.pdfIn PDF document text
    • http://wegoluxetas.scienceontheweb.net/list_of_daily_use_english_words_with_telugu_meaning.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/dowadotiju/the_magicians_book_series_lev_grossman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b09da2f0-770f-4abd-8b10-ea465f784890/what_are_the_duties_of_a_barista.pdfIn PDF document text
    • http://fufuzadawefor.onlinewebshop.net/modified_barthel_index_scoring.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/bts_memories_of_2018_link.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/bokatowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd94454-cbe9-484a-8ba5-2c537770f865/liwikomikabimubob.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/falarawar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e733ee-d49b-4c75-ad82-655460ffb199/39664279273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034f729d-ee7e-4536-8d7f-a8ba2f031a5f/diwenibixopazati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cbcbc7-2fab-4043-a52a-fcc085fc2377/bazusawaxol.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/1611_edition_king_james_bible.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_off0000ec1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1E 5660 bytes
SHA-256: 6f47f6aa9983af9a74e28850b79ca257f3bb96b492ea4e4654f171d78335167a
font_01_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 10368 bytes
SHA-256: 048a4543e180e8310b09dcc9247c2548c8e10cbc542c4c81f2f149be91121d72