Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa4ded6be322401c…

MALICIOUS

PDF

72.9 KB Created: 2021-03-17 11:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2279deabe7037828719f379fd5985e4f SHA-1: 49178ca671735379f440be658997f6593c5e704c SHA-256: fa4ded6be322401c8c722f81a9994a9b44530d875519d28580cea4e422587105
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure, likely related to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://yafferge.ru/strik?utm_term=where+do+i+buy+red+bricks+in+lego+harry+potter+1-4 In PDF document text
    • https://nodukuzizowuw.weebly.com/uploads/1/3/4/0/134000349/fetixa.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/best_rock_ballads_of_the_70s.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_60170e8a43e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486215/normal_6041781b4fa71.pdfIn PDF document text
    • https://murexaxinafol.weebly.com/uploads/1/3/4/4/134456221/vimimudel_xesisaxovomav.pdfIn PDF document text
    • http://digovin.getenjoyment.net/22426535552.pdfIn PDF document text
    • https://zabidikigez.weebly.com/uploads/1/3/4/5/134594795/1d5b47aba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500450/normal_6040b798b2433.pdfIn PDF document text
    • http://zasufigonibat.getenjoyment.net/how_to_calculate_simple_and_compound_interest.pdfIn PDF document text
    • https://sivevaredewiw.weebly.com/uploads/1/3/4/4/134464028/jofekizajenofate.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426087/normal_601122e92ea1b.pdfIn PDF document text
    • http://nutosuvitiraj.scienceontheweb.net/assistant_system_engineer_tnpsc_syllabus.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/international_journal_of_medical_sciences_and_current_research_pubmed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412778/normal_5feda349d92e6.pdfIn PDF document text
    • https://juwaxevepatasi.weebly.com/uploads/1/3/0/8/130874094/kamopix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412763/normal_600c680644580.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/gewisetug/76571628289.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/1053093423.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/pagevukitopalekofu.pdfIn PDF document text
    • http://zukomakiduw.myartsonline.com/tisetokukixesemepudawe.pdfIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/kasoxamukeluvife.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/monster_vs_aliens_2_full_movie_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/xutimor.pdfIn PDF document text
    • https://s3.amazonaws.com/jidagafinuxesu/kemodagogoxinobavisudef.pdfIn PDF document text
    • http://lufopudizomuv.atwebpages.com/what_are_the_characteristics_of_assets.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_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 5824 bytes
SHA-256: b08587d94fa66a5ad9ed79cf4d1e6d42082dcbd1aa290f26b0ad5d38ef69cae6
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 11268 bytes
SHA-256: 5d59356db0002059491b0983c3ab5986c2f4c6fa479c056251d02c1583070b98