Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f0386211c7efeef…

MALICIOUS

PDF

81.6 KB Created: 2021-03-16 18:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: da85ab6fd589f4b211add79719fb1ca9 SHA-1: 2fe8147ec7f8ff4b0108c70ff4c24374cc8d59a6 SHA-256: 2f0386211c7efeef84c7aa488c56e845fbda70695782b9f665ab25d2af7d1589
186 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 0.9993

Heuristics 6

  • 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 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://dugedepap.ru/strik?utm_term=wd+my+cloud+mirror+gen+2+4tb PDF link annotation
    • http://gallery-shop.site/jimojudunubf0is.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/bcf649b.pdfIn PDF document text
    • http://italy-small.space/wutunemefivr34i.pdfIn PDF document text
    • http://idealica-ordina.site/bolesoluxabopub1ndj2.pdfIn PDF document text
    • https://pekixutub.weebly.com/uploads/1/3/1/4/131453658/gowovimevili-pupot-somujexurifala.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/lowopobizane-pemuwe.pdfIn PDF document text
    • http://circulyarkadigital.xyz/paradise_toni_morrison_full_textx5p18.pdfIn PDF document text
    • https://zezevibowavaki.weebly.com/uploads/1/3/4/8/134854125/tabegukor.pdfIn PDF document text
    • http://znasila.ru/getow0dw9b.pdfIn PDF document text
    • http://goodshopsales.xyz/ayyappa_swamy_video_songs_freewlsv4.pdfIn PDF document text
    • http://private-channel.site/mixekesomafipewirepakuzfgj.pdfIn PDF document text
    • https://jawenovexexadu.weebly.com/uploads/1/3/4/0/134012785/4629501.pdfIn PDF document text
    • https://xovotirepotu.weebly.com/uploads/1/3/1/4/131412955/koxodosurafi-xotitaf.pdfIn PDF document text
    • https://kisuvali.weebly.com/uploads/1/3/1/1/131163683/zefogub_zugekiw_xilebomofunif_bubolab.pdfIn PDF document text
    • https://lifibopunikesi.weebly.com/uploads/1/3/3/9/133999807/f9bda5b84.pdfIn PDF document text
    • https://ruxibudowivuk.weebly.com/uploads/1/3/4/7/134728491/xejulimosikavu.pdfIn PDF document text
    • http://vashastrahovka24.ru/brother_mfc-6490cw_printer_error_36szzv9.pdfIn PDF document text
    • http://apple-fruit.space/521093608482beer.pdfIn PDF document text
    • http://masterpowerpoint.com/income_and_expense_forecast_template01pk1.pdfIn PDF document text
    • https://guwamiludakubor.weebly.com/uploads/1/3/1/4/131453222/9243587.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/33e434b8-6de0-4026-87e3-77aab2b15074/malibalipawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0b5fecc-a469-4273-b2d9-e640613e0511/xobatatoraladizawosafarig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9adebcf3-ddff-40cd-9adf-5f9adf112d56/tenarironozugaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d12fc9c-4130-443f-9599-9f363c14bbe5/does_panera_give_you_free_food_on_your_birthday.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_off000100ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AB 5348 bytes
SHA-256: 2f10cf4c468c1b485b66b9875ceb505994b61aeafde0f7348194264965ee6313
font_01_sfnt_off000112e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 11168 bytes
SHA-256: 911f54847b7452c8bc2d3e1d13843e5a0b2e8846a0969cb6d8850c5c88aedc24