Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5a29d3b58b35703…

MALICIOUS

PDF

65.4 KB Created: 2021-03-16 03:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 176d7816425cb7e4242a2b69dd674d05 SHA-1: 57a9822f430d72c40903c12f3b0c59b29e16279c SHA-256: a5a29d3b58b35703a59ee6974f3c03efe48e9a546327b735087a03705f37e067
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://gimoguvi.ru/strik?utm_term=korg+x50+synthesizer+used PDF link annotation
    • http://poverkavoda.website/31039887948t1sm2.pdfIn PDF document text
    • http://aydym.club/xapofubupowafasevazade2p0e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481820/normal_5fd16f77a71dd.pdfIn PDF document text
    • http://reduslim-shopofficial.site/amended_complaint_california_form3j7g8.pdfIn PDF document text
    • http://meblik.su/how_to_trade_forex_using_trend_lines28yix.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/bapejigobujusexaxo2k85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417525/normal_604fc3a334643.pdfIn PDF document text
    • http://italia-doc.space/how_can_financial_modelling_be_applicable_in_sensitivity_analysisi0ja6.pdfIn PDF document text
    • http://komamoj.22web.org/50714738630.pdfIn PDF document text
    • http://worldhold.online/goodnight_moon_book_coverctp79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503390/normal_6049e431b85a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373768/normal_60341be894d56.pdfIn PDF document text
    • http://center-about.com/parvovirus_perroht9iv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415081/normal_604fef893ed71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pixuxurarosu.epizy.com/48587158231.pdfIn PDF document text
    • http://lewuxiboru.epizy.com/ibps_bank_po_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/98572436084.pdfIn PDF document text
    • http://vipojidetag.epizy.com/como_funciona_reembolso_no_cartao_de_credito.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/adagio_cantabile_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/how_to_measure_corporate_culture_change.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/zejimatarikeno.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC479 5300 bytes
SHA-256: 4db745c7dbc0271741670f925c3bdca26ff4ee4a18d79d169cfa4c65ab495d57
font_01_sfnt_off0000d69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69D 9976 bytes
SHA-256: 55422bc276e8306f6656eac59b449508f0e7d67a5aec6a023abcc0a6ce075e4f

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