Malicious PDF — malware analysis report

Static analysis result for SHA-256 2df992d1b3d2802e…

MALICIOUS

PDF

77.7 KB Created: 2021-02-16 12:42:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e7cb588439e4f9d070be83f8315695fd SHA-1: 4b741350b6614cecdba18e1cde177a852c2dba52 SHA-256: 2df992d1b3d2802e2196d7db58b00ee914abfc361d6fd0088cf24fa5d44b0e78
126 Risk Score

Malware Insights

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

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 0.9995

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/strik?utm_term=what+does+landscape+mean+on+iphone+11 PDF link annotation
    • http://feruwikabi.iblogger.org/16330765387.pdfIn PDF document text
    • http://kapimivibix.22web.org/30568144935.pdfIn PDF document text
    • https://cdn.sqhk.co/fisejadiruw/iejfjhr/sajomimivosatete.pdfIn PDF document text
    • http://getchambre.xyz/assistir_globo_reporter_de_ontema5d00.pdfIn PDF document text
    • http://fastcreditcheck.info/41384603013mob5x.pdfIn PDF document text
    • http://lovemecompletely.com/562444352059uia3.pdfIn PDF document text
    • http://organize.shop/un_monstruo_viene_a_verme_libro2qot6.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/OBZhfjd/bezubeline.pdfIn PDF document text
    • http://frontglass.xyz/hachi_sushi_rockford_il_menucw42e.pdfIn PDF document text
    • http://kalavar.xyz/water_park_slidesm6yua.pdfIn PDF document text
    • http://bedanixabij.22web.org/acrylics_for_beginners_the_essentials.pdfIn PDF document text
    • http://aycotoro0.xyz/lesson_plan_template_secondary_schoolh8z1k.pdfIn PDF document text
    • http://usacreditmonitoring.info/the_ampscript_guide_eliot_harper12e7o.pdfIn PDF document text
    • http://nigasheff.xyz/funorelenre23.pdfIn PDF document text
    • https://cdn.sqhk.co/dezorevukor/pifjaDj/xogobo.pdfIn PDF document text
    • http://jiludedo.iblogger.org/65626714473.pdfIn PDF document text
    • http://raifaisentapp.online/the_namesake_jhumpa_lahiri62p90.pdfIn PDF document text
    • https://cdn.sqhk.co/detateseb/iicZBJe/balls_master_new_levels.pdfIn PDF document text
    • http://egosikenclub.com/53531086549z0xkl.pdfIn PDF document text
    • http://bu-markett.com/cen_tech_62120_software_updatepn7g9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedogevakubonog.epizy.com/42551849231.pdfIn PDF document text
    • http://lamiredej.epizy.com/15618385045.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_off0000f0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EE 5280 bytes
SHA-256: b4c6d0d7b07c0451f23b9511e8b8a40cecec2b74ec5b9e7f64a518fe132bc181
font_01_sfnt_off000102d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102D2 11076 bytes
SHA-256: 5a657fa851924a4f22d8e662fadb0d161749bc39c687f1b482b1be59b2d17541

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