Malicious PDF — malware analysis report

Static analysis result for SHA-256 704cb6725e782d96…

MALICIOUS

PDF

78.4 KB Created: 2021-02-21 17:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 965655c23b1a81b0a7bfb2ad2afa0698 SHA-1: 81e9c35938034385207b6984ac364879648e0d77 SHA-256: 704cb6725e782d96849a5e4da97888d642c3064d3125f4c470606787a1f4effa
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. It contains numerous embedded URLs, with one prominent URL pointing to a site related to 'kinetico premier compact water softener cost', suggesting a phishing or scam lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=kinetico+premier+compact+water+softener+cost PDF link annotation
    • https://cdn.sqhk.co/mudaxomemut/MIhijeF/xafutoduv.pdfIn PDF document text
    • https://zizuvikugit.weebly.com/uploads/1/3/1/3/131384696/786173.pdfIn PDF document text
    • http://matroskin.space/rental_move_out_walk_through_checklistifr1e.pdfIn PDF document text
    • http://gejepixaso.iblogger.org/ruwitoto.pdfIn PDF document text
    • http://boothattendant.com/10068635056q5uoe.pdfIn PDF document text
    • http://fastcreditcheck.info/excel_find_duplicate_in_another_sheet7yids.pdfIn PDF document text
    • https://bevotiwi.weebly.com/uploads/1/3/1/4/131437753/1859205.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/fujilosorotux.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/OjfgZid/free_business_plan_samples.pdfIn PDF document text
    • http://apple-fruit.space/26173361987qr4x.pdfIn PDF document text
    • http://alexandreablog.com/bartaman_bengali_news_paper_appsw4mku.pdfIn PDF document text
    • https://gipulafu.weebly.com/uploads/1/3/4/4/134442702/1430048.pdfIn PDF document text
    • https://kuratiwupojaxu.weebly.com/uploads/1/3/4/0/134017491/536d3f.pdfIn PDF document text
    • https://cdn.sqhk.co/mumesimasozo/ghcfzhc/lejexulidunenetiwoxewetoj.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/topipovikapari/astigmatismo_regular_e_irregular.pdfIn PDF document text
    • http://rozopujonabesix.epizy.com/zefivef.pdfIn PDF document text
    • http://rumakepalo.rf.gd/alpha_thalassemia_pregnancy_guideline.pdfIn PDF document text
    • http://lesuzikabe.epizy.com/nodale.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/llda_smr_report_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/bar_graph_worksheets_5th_grade.pdfIn PDF document text
    • http://likalesiwala.epizy.com/mawunit.pdfIn PDF document text
    • http://fuluputig.epizy.com/battleon_classes_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/alien_vs_predator_imdb_parents_guide.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_off0000f5e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 5192 bytes
SHA-256: 2bc6b4fdb585f9f88b7d0ac8397165548ded3a06e5584204c3882c953cfb5921
font_01_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 10524 bytes
SHA-256: f1668afec7727c72a25afda5b4666a95a80ee223d02db70b17affda0791aaca0

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