Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e3b1d2fcc968f5…

MALICIOUS

PDF

96.3 KB Created: 2021-02-20 21:52:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e22fdbe5f27f0746d63c4d103ff5b092 SHA-1: 1ce58385b1cd83c60d7ef9ee9f637c42e3e0441d SHA-256: 80e3b1d2fcc968f583226df54e542818237400f834eab51b391dbd61a8f3b7b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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://leonvi.ru/strik?utm_term=how+to+start+a+vegetable+garden+home+depot PDF link annotation
    • http://pro-komp-master.website/pikesurutetugaph1nx7.pdfIn PDF document text
    • http://sudenusona.66ghz.com/marvel_characters_list_with_pictures.pdfIn PDF document text
    • http://romotogez.22web.org/video_converter_for_android_2._3._5.pdfIn PDF document text
    • http://momentikshop.space/third_form_at_malory_towerswz1jc.pdfIn PDF document text
    • http://kersita.space/zuripijadurugepigagesilur7stn.pdfIn PDF document text
    • http://zifosazoniduve.22web.org/how_to_draw_a_scalene_triangle_in_word.pdfIn PDF document text
    • http://shoplus.info/local_guide_iceland_ice_cave_tourgfzh9.pdfIn PDF document text
    • http://tevalevas.22web.org/vatobisidupanab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499636/normal_6022c7f392273.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fapiranug.epizy.com/vajeboratomixi.pdfIn PDF document text
    • http://lisudanuzi.epizy.com/all_about_me_sheets_for_adults.pdfIn PDF document text
    • http://pofazutufugu.epizy.com/inventory_sheet_sample.pdfIn PDF document text
    • http://guxajez.rf.gd/classifying_triangles_worksheet_3rd_grade.pdfIn PDF document text
    • http://feselipalez.epizy.com/samsung_5100_battery_pack_manual.pdfIn PDF document text
    • http://jabowedufup.epizy.com/xawek.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_off00013b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B8A 5628 bytes
SHA-256: 45ac441966168f271fe514a307c49045931f31fa3ba185e8de1b270be502bf23
font_01_sfnt_off00014e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E91 10976 bytes
SHA-256: 25e424248f2cf6efc5d730a457570021af0d0c7b354511a4b451b38e7bd32185