Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe4a0afbb195ee9…

MALICIOUS

PDF

78.0 KB Created: 2021-03-20 15:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 905a2998430581ced727c3df157b5e8f SHA-1: f89703615df1fdbc05b7aa8e41095f11bc212f48 SHA-256: ebe4a0afbb195ee9ab55a6d45b24599ae244c56f010cede8ba1e42a4f0540b4e
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating it functions as a link farm. Several heuristics, including 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM', confirm this behavior, suggesting the document is designed to redirect users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/wix?keyword=the+elegant+universe+pdf PDF link annotation
    • http://gedatidigog.sportsontheweb.net/english_words_meaning.pdfIn PDF document text
    • http://instapodarok.site/nodawexsa4mf.pdfIn PDF document text
    • https://jupedozezuwobig.weebly.com/uploads/1/3/4/0/134040413/diwetuli.pdfIn PDF document text
    • https://cdn.sqhk.co/gogoturowib/jfFZWgh/best_songs_of_john_farnham.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/87ab884da66d.pdfIn PDF document text
    • http://bijowuxupolapi.sportsontheweb.net/23140562864.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/duijaMW/sculpture_garden_nj_rat_s_restaurant.pdfIn PDF document text
    • https://cdn.sqhk.co/mokopizel/gchagjh/fuwuvuronejefasoda.pdfIn PDF document text
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/10fdefa10.pdfIn PDF document text
    • http://reduslimitalia-oficial.site/hp_officejet_pro_8600_scan_to_computer_not_workingtuzjw.pdfIn PDF document text
    • https://puwawegolawibot.weebly.com/uploads/1/3/2/6/132682739/nizutiwixuvadibaj.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/email_marketing_examples.pdfIn PDF document text
    • https://cdn.sqhk.co/lebapivi/Bji1Euf/kart_racing_helmet_camera.pdfIn PDF document text
    • https://pulapafux.weebly.com/uploads/1/3/0/8/130874232/1147822.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/xozepelosaratesolofe.pdfIn PDF document text
    • http://shop-you.xyz/tratamento_da_anemia_megaloblasticakzdl7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_677977fa3134443bb6ded2ada3b3aca1.pdf?index=trueIn PDF document text
    • http://tiwedozesa.atwebpages.com/cardiopata_de_takotsubo.pdfIn PDF document text
    • https://5c817321-7c0c-448b-959d-deb1da9fd788.filesusr.com/ugd/19103d_3c3998c61dda40308fff10f1a065229f.pdf?index=trueIn PDF document text
    • https://8137cd1e-393d-4948-8193-eca935452849.filesusr.com/ugd/756799_2fa504c943114006aa09ca4a78109b10.pdf?index=trueIn PDF document text
    • https://1ce8651a-bfbb-4b9a-b1bf-24b3b574775a.filesusr.com/ugd/ac72e0_3afbdfc36292425ebeab14637b604060.pdf?index=trueIn PDF document text
    • https://8c17aa34-c454-4d6c-a218-8929c845e329.filesusr.com/ugd/808cd0_1d1bd7d169fd484baf0929a0215375c8.pdf?index=trueIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_c939276c947148c09bb69eb0e09fe5ad.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_3ac698f9e9e749aeb3e5249c8d8134ad.pdf?index=trueIn PDF document text
    • https://cc6d8859-fc08-4100-a073-55b48c5addfc.filesusr.com/ugd/238140_f43aa112e169419cafe06eed304cc224.pdf?index=trueIn 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_off0000f121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF121 5312 bytes
SHA-256: 82e1aee3bba44962cc92acdf00976697bd4104aa4c668d154772e37ac9988dce
font_01_sfnt_off00010338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10338 12196 bytes
SHA-256: 44b2f17fc429d188cff69fec2aa5ba766843fb913f1934b651db3583a9f5f229