Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d86602cf70e2efa…

MALICIOUS

PDF

69.9 KB Created: 2021-03-03 17:33:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bb14cc269d8003b38bde9e296942e648 SHA-1: f048665b1803cc8e1900be2ccfcb1a1a0cd45cef SHA-256: 6d86602cf70e2efa098c427830814d44af27f33cf933e0ead4bc5d2e4c7e5a00
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=soccer+heads+championship+2015%252F16 PDF link annotation
    • http://fuwijumazawad.mywebcommunity.org/62584545275.pdfIn PDF document text
    • https://sujutirox.weebly.com/uploads/1/3/4/5/134595549/tikejosabepapu_xanadibaz.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/acide_olique_formule_semi_dveloppeeej11.pdfIn PDF document text
    • https://jemogofeti.weebly.com/uploads/1/3/4/0/134042608/9227976.pdfIn PDF document text
    • http://odemebayisitrafik.com/my_work_history_report_online_freeo7g1s.pdfIn PDF document text
    • http://makedctl.site/spanish_reading_comprehension_worksheets_high_schoold6pul.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/54481177515.pdfIn PDF document text
    • http://rubyshup.space/xevopasevijadk6ru.pdfIn PDF document text
    • http://gobigs.space/carl_jung_personality_test_history4jst5.pdfIn PDF document text
    • https://nojinogexosop.weebly.com/uploads/1/3/4/6/134695112/4887025.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/dejeru-jufep-vobuz-wosipig.pdfIn PDF document text
    • http://gnoogle.site/mizoliziviligoluoel3.pdfIn PDF document text
    • http://teachost.com/severe_malaria_who_guidelines9gqes.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/asp.net_mvc_with_c_tutorial.pdfIn PDF document text
    • http://poverkavoda.website/diarios_de_motocicleta_pelicula_completa_espaol_latinopksvm.pdfIn PDF document text
    • http://gapagal.mywebcommunity.org/tanaf.pdfIn PDF document text
    • http://sexesex.site/dna_structure_review_worksheet5pie9.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/how_many_decibels_is_a_honda_3000_generator.pdfIn PDF document text
    • https://gososeru.weebly.com/uploads/1/3/4/5/134597059/1418964.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jokosen.atwebpages.com/d-in_unlock_tascam_cd-rw900sl.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/68382120501.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_off0000d1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E3 6024 bytes
SHA-256: a65e1b38c0e1c249d2cc1b18b6d8e2bb21eb3c927ff1f7dd09747737b2a48f3a
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 10564 bytes
SHA-256: 239a469a2f89a4484b9c4fc2ca21558e5a80381ef0a87be3f202bd8ef517342e

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