Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb32948afbed9d10…

MALICIOUS

PDF

74.2 KB Created: 2021-02-28 12:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b8d78b9f96ff6e60bbbd9889a7102241 SHA-1: e8a36e6b8013a24591a7097b911b0447c52beb1f SHA-256: eb32948afbed9d1083cb784fe9a9d8f43d600a2ebdc03fcefaf411a95cf841c9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains or subdomains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the PDF structure point towards an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/123?utm_term=dewalt+impact+drill+bit+set+lowes PDF link annotation
    • https://cdn.sqhk.co/jarogofef/jjkF1ha/airbag_light_honda_crv_2007.pdfIn PDF document text
    • http://lovelyhouse.online/785165885613bjps.pdfIn PDF document text
    • https://cdn.sqhk.co/pofaxiniraz/K5idji1/89954665829.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/rhghbha/zobor.pdfIn PDF document text
    • http://vinnipoh.space/chrome_error_0xa04307212xc4x.pdfIn PDF document text
    • https://kefomituwo.weebly.com/uploads/1/3/2/8/132815939/sajabeseranizexif.pdfIn PDF document text
    • http://choosemadam.site/fluke_337_repairvzvm1.pdfIn PDF document text
    • http://shopee24.site/active_listening_skills_exercisesjaubq.pdfIn PDF document text
    • https://cdn.sqhk.co/difakezil/T0s3jjR/4k_cartoon_wallpaper_for_desktop.pdfIn PDF document text
    • https://cdn.sqhk.co/sejixikerut/nhgCmih/creating_group_excel.pdfIn PDF document text
    • http://whalesqpa.fun/camry_hybrid_2020_price_in_pakistan92dn7.pdfIn PDF document text
    • https://zukudanasoxe.weebly.com/uploads/1/3/2/8/132815154/1660404.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/ghdhjgc/nekezak.pdfIn PDF document text
    • https://ragojozuzaz.weebly.com/uploads/1/3/4/6/134668900/meziz.pdfIn PDF document text
    • http://reduslimitalia.site/what_is_coconut_oil_composed_of9ksbx.pdfIn PDF document text
    • http://lavkavkusa.store/267427918696jy5o.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/hagfoia/81689547313.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wofaxil/runulawabuxadu.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/biotic_potential.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/baybayin_font_photoshop.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/ley_anticorrupcin_peru.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/ssc_chsl_2019_application_form_sarkari_result.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_off0000e355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE355 5452 bytes
SHA-256: a1836ab0e22a772f2fa977c83ce436136e22aa69f6e1fa33451711888c36f3d3
font_01_sfnt_off0000f5cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CF 11064 bytes
SHA-256: 9aa659d3f4a5420236966cb9d948bb10547902b59a585054e19796bc9dad9967

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