Malicious PDF — malware analysis report

Static analysis result for SHA-256 632d1d81ac6b765d…

MALICIOUS

PDF

81.6 KB Created: 2021-02-19 20:16:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b1ecf97357ebbe7c9a0d4b2bfff61717 SHA-1: d5520c7226c2e64d7577af86c13067810e41bace SHA-256: 632d1d81ac6b765d263ebbc250f2a1aa4bcc21ac994833dfe145f38ddd031f72
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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://crophysi.ru/123?utm_term=how+to+clean+bottle+warmer+dr+brown In PDF document text
    • http://masito.space/introduction_to_project_management_6th_edition2agbv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5ffccf3ad403a.pdfIn PDF document text
    • http://magnetfix.store/metikunurixezafareturuwj4hht.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499972/normal_6014d071cc4d4.pdfIn PDF document text
    • http://goodsun.space/36122770208hipjj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_60196500e096b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445129/normal_60256fa16449d.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/hhmhh5a/pinata_store_austin_tx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486051/normal_600321efe0655.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444096/normal_6015ffc9072dc.pdfIn PDF document text
    • http://fudasoba.iblogger.org/pink_floyd_dogs_piano_sheet_music.pdfIn PDF document text
    • http://prizinsta.info/basic_computer_science_questions_and_answersclrj4.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/lolaritemukole/dexofuke.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/jivaxiduwokusoberekejif.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/front_page_of_internal_audit_report.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_off00010319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 5100 bytes
SHA-256: 091835318453577dd3d7056f9387eecb7512eba4ff34605171dcaa16a4e64c7c
font_01_sfnt_off00011467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 10944 bytes
SHA-256: 13639facbd81c7f9bf802fb3847ceea16a36387c8759932519bfcd3eed46ca84