Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3186743db6942ef…

MALICIOUS

PDF

82.7 KB Created: 2021-03-16 18:43:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d994fc984d97c3a5bdfc0b186620646f SHA-1: c42d2b1f10b1df7402f5eb9a0218389878c46408 SHA-256: c3186743db6942efb3f55b928ce889ba1f6e5aaa9ac0c6fc012865855592a9db
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are likely part of a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as phishing. The document's structure and embedded links suggest it is used to direct users to phishing or scam websites, masquerading as legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/wix?keyword=pvc+pipe+installation+guide PDF link annotation
    • https://cdn.sqhk.co/mezutowede/hiRiicl/spirit_halloween_store_middletown_ny.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365536/normal_5fdcd0dece2ab.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/lalanuz.pdfIn PDF document text
    • https://faniruwesil.weebly.com/uploads/1/3/5/9/135993686/batijumoxemavi.pdfIn PDF document text
    • http://bionatur.space/element_tv_troubleshooting_no_media_devicekc5ib.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/2631658.pdfIn PDF document text
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/vawosubudumulegegex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_60205c6dcfbe2.pdfIn PDF document text
    • http://thedopemarketing.com/nimigelisipepatatuxi8h8tv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_6041b61fb033d.pdfIn PDF document text
    • https://vuxofuta.weebly.com/uploads/1/3/4/2/134235669/finupab.pdfIn PDF document text
    • http://marketeuro.pro/154451729172xtat.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475716/normal_603a9609a5f6e.pdfIn PDF document text
    • https://cdn.sqhk.co/wafavalufa/ifoUjsS/vr_cinema_3d_oculus_rift.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59aaad2c-1469-4846-8ba7-eca6d6cd9f8f/lakota_woman_mary_crow_dog_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/how_to_print_from_hp_deskjet_2540.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/93917638424.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/manual_notebook_hp_probook_4530s_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eddc5dc-e744-4bfd-9ffd-9096d2fbc456/pajonovazijixizoletuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c560fa11-30ca-4dce-a6ab-79b62deaf825/gogitixo.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_off0001066f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1066F 5208 bytes
SHA-256: c5f6d40dbd365425be56ae7cb5eeaf152947876e6bdd10c3544bccbbcc15a1d9
font_01_sfnt_off00011841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11841 11144 bytes
SHA-256: d4c68dd0befe647d732ac9b979234873224d4fe81e46690c5b1219a308f70712

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