Malicious PDF — malware analysis report

Static analysis result for SHA-256 02016d4da2acad9b…

MALICIOUS

PDF

66.0 KB Created: 2021-02-28 22:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4d649e6b745537879c55e6a148f46677 SHA-1: b24963de0fdda62c2f44c38a695acdc2d57c0d81 SHA-256: 02016d4da2acad9bd5ed3e9f125ec246a85504defa5a38570954dd7c2058ad2c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the use of disposable hosting and UTM parameters, common in phishing campaigns.

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
  • 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://resalured.ru/strik?utm_term=vector+calculus+susan+jane+colley+4th+edition+pdf PDF link annotation
    • https://xuxerativizujaf.weebly.com/uploads/1/3/1/0/131070719/xemewisezoviwi-gonum.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/bgcUheP/raxuzevil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408851/normal_60135d5d58ae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_6036075cbb3ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475212/normal_5fed74e03490b.pdfIn PDF document text
    • http://3gusevshop.website/xilineml0qbv.pdfIn PDF document text
    • http://reduslimitalia.site/watercolor_painting_lessons_free_downloadpierr.pdfIn PDF document text
    • http://skywonder.space/1_2_inch_plywood_sheets_4x8gteqc.pdfIn PDF document text
    • https://nililuwuta.weebly.com/uploads/1/3/0/7/130775375/7605898.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/xadezerabo_wuzafogepagino_tafiwevujawu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477623/normal_6028a7f341317.pdfIn PDF document text
    • https://cdn.sqhk.co/wewowedim/hVSifgg/my_mighty_dragon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403824/normal_602178454dcbd.pdfIn PDF document text
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/devodobusu.pdfIn PDF document text
    • http://getyourcredit.info/how_to_change_code_on_chamberlain_liftmaster_professional7wq4u.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/goveruduzewoxu/vereketiramelujapudakowi.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/arduino_tuto_francais.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_off0000c595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC595 5476 bytes
SHA-256: c1534db3f526214b9bcbbeae543b94784e42edf5b33fc5017da845f50a6cb9ad
font_01_sfnt_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 9988 bytes
SHA-256: 6a7850c3aff755d06cd80d3a7d1df5df66c13417af6567abd973699210adba2b

Open this report in the interactive analyzer, or submit your own file for analysis.