Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9508102a06097f7…

MALICIOUS

PDF

76.8 KB Created: 2021-03-16 04:02:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: c3cf07c46fc9cc12397907106718cce0 SHA-1: 50cb0b0b23dfb0b1a859f19b6d9f7ac5ac4e9c88 SHA-256: d9508102a06097f7e4639b7a469e1a4c55c973583e53a2840d60ef8b1b8b53ca
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least one pointing to a domain (`baarspo.ru`) that appears to be part of a link farm designed to redirect users. The presence of external URIs and the link farm heuristic suggest the document is intended to direct users to potentially malicious websites, likely for phishing or malware delivery.

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
  • 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://baarspo.ru/wix?keyword=brandon+college+hill+south+beach PDF link annotation
    • http://vizemezezu.sportsontheweb.net/fexuwusikise.pdfIn PDF document text
    • http://discovljzg.fun/mabovunixevabavegepipopif83zmf.pdfIn PDF document text
    • http://nemugub.mywebcommunity.org/12302576892.pdfIn PDF document text
    • http://virona.org/73375100529yjyvv.pdfIn PDF document text
    • http://fatiberekizibu.iblogger.org/36592350207.pdfIn PDF document text
    • http://igafnd.org/the_other_side_kate_granger_bookh9oy3.pdfIn PDF document text
    • http://gibelineg.sportsontheweb.net/67119266900.pdfIn PDF document text
    • http://hyipinvest.site/fixosexuzunudarupewoj7dw9m.pdfIn PDF document text
    • http://kpupnov.pro/witosoropapovogigojobojip64fz.pdfIn PDF document text
    • http://roskycnmx.com/76077749227rc541.pdfIn PDF document text
    • http://tofosasolamet.iblogger.org/adverbial_clauses_examples.pdfIn PDF document text
    • http://kozevoviwepok.iblogger.org/2191950491.pdfIn PDF document text
    • http://soul-felt.com/88036225190r2wfx.pdfIn PDF document text
    • http://exampl1214.com/93218486729x5n88.pdfIn PDF document text
    • http://xteenware.online/vudugiferimumezumunatugabs8q5p.pdfIn PDF document text
    • http://salonly.xyz/english_to_gujarati_dictionary_software_free_download_for_windows_7rffvs.pdfIn PDF document text
    • http://walkover.me/mefinajejiwatekevejiabi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gasigigi.rf.gd/feleminuximo.pdfIn PDF document text
    • http://joxumokuri.epizy.com/business_analytics_salary_masters.pdfIn PDF document text
    • http://lijazujarakowom.epizy.com/wowatitexokugir.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/my_zombie_myself.pdfIn PDF document text
    • http://tidukalimipeba.epizy.com/mutants_and_masterminds_srd.pdfIn PDF document text
    • http://guxajez.rf.gd/mudisewoguwibibebujemo.pdfIn PDF document text
    • http://davofunup.onlinewebshop.net/articles_grammar_exercises.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_off0000ed5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5C 5388 bytes
SHA-256: 8a3d461e2752bcec2e6fd237edac5c8050f75ee0ebd14249fe51e4b21e5814cc
font_01_sfnt_off0000ffa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFA0 11340 bytes
SHA-256: 39fea99c33fd3262338ad46d1ea483d93a69432dcc631465e7df607662c5e3e1

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