Malicious PDF — malware analysis report

Static analysis result for SHA-256 d909ecab30fe11be…

MALICIOUS

PDF

80.1 KB Created: 2021-04-11 05:25:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 84e3139851346d745fae398c9271380e SHA-1: b020d39104f5c8d9ba86ca9dc3a68856b299d4d9 SHA-256: d909ecab30fe11be83720fad0e845339ee091bc6f2beab03ad8617aba618a090
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/strik?utm_term=what+are+the+characteristics+of+roman+sculpture PDF link annotation
    • http://gizaxeredemuni.22web.org/rupodedafe.pdfIn PDF document text
    • https://xefanopebowemid.weebly.com/uploads/1/3/2/6/132681782/6620756.pdfIn PDF document text
    • https://rasabukogetak.weebly.com/uploads/1/3/1/6/131606550/a6c0a.pdfIn PDF document text
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/9247758.pdfIn PDF document text
    • https://lenexemumuvag.weebly.com/uploads/1/3/1/4/131438583/raboni-jasimukarajetat.pdfIn PDF document text
    • https://nepexinis.weebly.com/uploads/1/3/1/4/131438592/7441247.pdfIn PDF document text
    • https://xegezegev.weebly.com/uploads/1/3/2/6/132683484/502031.pdfIn PDF document text
    • https://lurabesuweki.weebly.com/uploads/1/3/4/5/134524451/rekabowi.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/jedofamikabazi-bumexuxediwezon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18282f24-d4e3-4c19-b4d9-8e3fdaa82145.filesusr.com/ugd/df2b7b_5f536fd6abc34e4aa1684c951c6e8fea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/the_lightning_thief_reading_level.pdfIn PDF document text
    • http://jinibodakix.epizy.com/brochevarevarura_movie_2019_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/59788997236.pdfIn PDF document text
    • https://f856bbc4-01c8-45e4-8891-a53c5ee59fd0.filesusr.com/ugd/8e827e_6bff4a44c143401b8ec02fda64c3fdcd.pdf?index=trueIn PDF document text
    • https://e301b21f-f707-426c-a094-6199d4b1a2d6.filesusr.com/ugd/f65518_19b952f3226a41df9329a6e64a2ac8ac.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mamibis/nojegavukuzewalome.pdfIn PDF document text
    • http://jepogedepujadul.rf.gd/verizon_router_blinking_yellow_light.pdfIn PDF document text
    • http://vakusidoler.epizy.com/99779842510.pdfIn PDF document text
    • http://pasumogebono.rf.gd/wowemisafovit.pdfIn PDF document text
    • http://vizijikiwoler.rf.gd/full_form_of_adp_in_biology_term.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_811758c91a6641d799100e1fd1d4c7ec.pdf?index=trueIn PDF document text
    • http://xiwakutev.epizy.com/blood_powerpoint_template.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_1272f5f08ac2462ab591003285ec6974.pdf?index=trueIn 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_off0000f304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF304 5268 bytes
SHA-256: 567b1ae27087817b068145b2f57f92e0400217d4bd7fd9ec4ab28ef55223c918
font_01_sfnt_off000104c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C9 1900 bytes
SHA-256: 337985fecbbf43bd7dc9ef7b4fe9191ea5ed691a37d510777a9e24881e80bdf6
font_02_sfnt_off00010dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEE 10216 bytes
SHA-256: 35b0a314d3250f3638a3799e8e67eaa801b6371e7d93d165dbb4fefa7445c140