Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb200e6a3f7d7ed9…

MALICIOUS

PDF

82.5 KB Created: 2021-04-10 12:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 698db670079941f45fed946d9d225ba9 SHA-1: 86f5b0b47a7c80efc0d5655d207931e1af26bb87 SHA-256: fb200e6a3f7d7ed98fbcf9f548bc80a596055c0ef4fe24937b347c75855fae4e
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO link farms to manipulate search engine rankings. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing or trojan variant. The embedded links, such as 'https://bologen.ru/strik?utm_term=interview+with+the+vampire+river+phoenix', suggest a lure to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://bologen.ru/strik?utm_term=interview+with+the+vampire+river+phoenix PDF link annotation
    • http://tapozifokun.mywebcommunity.org/54377339482.pdfIn PDF document text
    • http://vizionsmc.net/5402260256ajlj.pdfIn PDF document text
    • https://kepubewi.weebly.com/uploads/1/3/6/0/136095452/43e8355a.pdfIn PDF document text
    • https://mikatafa.weebly.com/uploads/1/3/1/3/131398449/5bbae039daf46.pdfIn PDF document text
    • http://babusokojanog.sportsontheweb.net/92053165318.pdfIn PDF document text
    • https://nosisakapu.weebly.com/uploads/1/3/4/7/134773138/bfba38b8.pdfIn PDF document text
    • https://dubobovutorikug.weebly.com/uploads/1/3/5/3/135332124/nasijogubok-wiboru-zaditasaso-durukulux.pdfIn PDF document text
    • http://afracheat8.xyz/marques_de_sade_pelicula_completa_en_espaol_latino39hwz.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/kijelopazekune/nozulimugef.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/magepibinavizurituw.pdfIn PDF document text
    • http://zevesijuduma.atwebpages.com/what_does_it_mean_by_aggregate_planning.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/68688243580.pdfIn PDF document text
    • https://54fa3baf-6954-44a2-98df-2137f0cc340f.filesusr.com/ugd/14b79e_bc67970173194a1cbbe77027e31ad7cb.pdf?index=trueIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_4478eea7e77f4406885f837fa62d3687.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petikamov/batixufelev.pdfIn PDF document text
    • https://a4346b84-4611-49ab-b113-80c9188ca613.filesusr.com/ugd/078c79_3b08ef1dd6774a7b823d2a9364002d7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/crochet_patterns_for_bernat_super_bulky_yarn.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_5541f0b8682c472d801171dd8baed5c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fatisake/lenozuteturego.pdfIn PDF document text
    • http://jokodakive.onlinewebshop.net/jerosus.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_off000104bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BF 5008 bytes
SHA-256: 974cea869d2afce71f7f4501560b2c4705fa8b799ba6c81008caafa1c0d39a8b
font_01_sfnt_off000115af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AF 11456 bytes
SHA-256: 0e4882cf576081e93b78f0ded51a85cb9902e849fc25dd01250f10eaa1104b33

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