Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8e2c1b17326fee0…

MALICIOUS

PDF

83.8 KB Created: 2021-02-17 01:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2be8b1d8d692aa74b3ac462be3c13747 SHA-1: af35c1bb5451fc7e42df06917d982fc359c611f7 SHA-256: e8e2c1b17326fee0a8f1b4865ce1a65af576d0e94c69dfbb82a773c608b1b517
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical finding for a PDF link farm containing numerous external URLs. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs suggests an attempt to redirect users to potentially malicious sites, likely for phishing or to download further payloads.

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=are+lg+washing+machines+reliable+uk PDF link annotation
    • https://cdn.sqhk.co/nezerozara/ogjibNa/zara_home_uk_sale.pdfIn PDF document text
    • https://nusiteraj.weebly.com/uploads/1/3/5/3/135347212/jozimuvajebujeb.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/4008651.pdfIn PDF document text
    • https://kilavolofijon.weebly.com/uploads/1/3/1/1/131164174/0d0fe914c7d5b.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/tinajabizoreguf/china_airlines_flight_611_report.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/format_for_experience_certificate_for_pharmacist.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/demaryius_thomas_injury_report.pdfIn PDF document text
    • http://dosujag.rf.gd/patch_9._18_tft_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/bigg_boss_3_tamil_episodes.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/rabejirojora.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/67195391416.pdfIn PDF document text
    • http://mefuxunopurojim.rf.gd/white_christmas_the_drifters_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/gumusemodadavu.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/flight_1942_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/77279722136.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF546 5496 bytes
SHA-256: 71f6759e02d463bf158f7d95e6cffe333053087ed832dbe5b83243d8c51aa19a
font_01_sfnt_off000107e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E4 10708 bytes
SHA-256: d76a450ec09c912e5fc6da810997d18cd8e8a186750fa5ca88ec84516f32279b
font_02_sfnt_off00012c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C74 16148 bytes
SHA-256: 51babe3b44e703ca5a92278b053c112c5c116674d3b708c8e2cb3e4aa6bd9a04

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