Malicious PDF — malware analysis report

Static analysis result for SHA-256 e820e8fa281e6fb5…

MALICIOUS

PDF

82.1 KB Created: 2021-02-19 00:27:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a909dd754026564ca0a1066a5d424092 SHA-1: d689baaf6bdb2044d44f8f406bfb04954a9584ac SHA-256: e820e8fa281e6fb52bd873c8f5a3f1b3e65f16b87eff0b6a9639fe205ed8f6af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, suggesting it's part of a link farm or phishing campaign. The primary URL, https://seumenha.ru/strik, is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=what+is+working+class+uk+2019 PDF link annotation
    • https://cdn.sqhk.co/gorisaburo/ihfehfg/manhattan_neighborhood_crossword_clue.pdfIn PDF document text
    • https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/jixaw-lifetip.pdfIn PDF document text
    • https://cdn.sqhk.co/legezuseg/hiMibja/pufetexa.pdfIn PDF document text
    • https://mibofadap.weebly.com/uploads/1/3/1/6/131637701/afc9e58.pdfIn PDF document text
    • https://balolekuzuwuvaz.weebly.com/uploads/1/3/0/7/130740598/xolejowojo.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/laregu_tepawad_pafarasojewa_diparomat.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/dj7Uif2/free_first_aid_certification_online_australia.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/dgiLOQA/unhide_formula_bar_in_excel_2010.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/0eiahch/wotaperenifogexixeg.pdfIn PDF document text
    • https://cdn.sqhk.co/vimerokil/xicSAdE/install_directv_app_on_smart_tv.pdfIn PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/nexuvesiponix.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/5ginjcl/sad_heart_touching_mp3_ringtone_download_telugu.pdfIn PDF document text
    • https://cdn.sqhk.co/wiluxuko/jhhcvih/bumarepemazovoj.pdfIn PDF document text
    • https://cdn.sqhk.co/bobavijiwoba/3jb6jbK/gafefove.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/bupaxomu/78278650683.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/capacity_management_information_system.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/gubonuredeximixi.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/77249144924.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_off0000ff59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF59 5712 bytes
SHA-256: 40cbff3af96c028fa9fa0e021a7938d17afc7d0d54841554b53967dcb6e14b96
font_01_sfnt_off000112e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E7 12348 bytes
SHA-256: 44c2923c1605b9cd3bfcc4485588a760fc9af8153c161f3195a58c8bd755d9e4

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