Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ebb14a8c83299a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-15 15:57:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5a41868df5b41f0cd5e43d43b3760868 SHA-1: 445f02c6b883fcab2e7a6d5c782c70fb3108050d SHA-256: e9ebb14a8c83299a1360f05fbb1f40f224d5ee585e88dc149d103f6c73ab3f0b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to 'vilenefex.ru', suggesting a phishing or malware distribution attempt. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of external links, many of which are likely malicious or used for SEO manipulation to obscure the true intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or a trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/123?utm_term=facebook+messenger++for+samsung+mobile PDF link annotation
    • http://marketeuro.pro/fuduvowafanufenl4mee.pdfIn PDF document text
    • http://nesobaka7.xyz/cbt_core_beliefs_worksheet7nb2j.pdfIn PDF document text
    • http://usacreditreport.info/sullivan_trigonometry_a_unit_circle_approach_10th_edition_answersc60gu.pdfIn PDF document text
    • http://helper-badges.com/23927287811276vm.pdfIn PDF document text
    • http://nncucuucuc.space/texas_instruments_ti-nspire_cx_cas_touchpad9eyag.pdfIn PDF document text
    • http://new-leggins.site/mppgcl_je_syllabuse2ad4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da550aaf-34ae-4f9b-ad82-7836b82beebe.filesusr.com/ugd/a203e6_bc1534f671d24729a539c7e9707ce4d1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadobirak/battle_angel_alita_mars_chronicle_6.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/chori_chori_chupke_se_aayega_song.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/xopuxajudavebiget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a473e5e-2b9f-460f-8a59-6f1977558ee7/jobagixorotubixape.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/dosenozufilowudawos.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/wewipupamisuf.pdfIn PDF document text
    • https://8ed62699-7d02-4439-b935-4286882ef7d4.filesusr.com/ugd/229b11_cdacca5b78c044d8ae1ff2c505ade7af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/benten_game_free.pdfIn PDF document text
    • https://54d25d35-1219-4e5f-97c3-905e72ea606f.filesusr.com/ugd/6d59ab_b3cb0ee5ecf44cca97e4242c9474a4d1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/02332486-9ba2-40ad-b361-6549c29e3c56/rubimin.pdfIn PDF document text
    • https://e8f98835-b194-42a5-b43f-fe2f29920dd6.filesusr.com/ugd/bf650e_06c2ce60caea4d0c9915f3a65dc9c976.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/blockchain_understanding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9cc7b4c-4b47-4d98-96c4-3c829d4a072d/31016763089.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/dcfs_mandated_reporting_training.pdfIn PDF document text
    • https://s3.amazonaws.com/gogoxowiniza/thyristor_c106d_datasheet.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_off0000ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 5360 bytes
SHA-256: bc24ff30787c9fccaeddf5df6d938f4f308816e609a0fae2dcc31e0aec3213f7
font_01_sfnt_off000101a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A5 9048 bytes
SHA-256: 2777fe9b5a753c4d3c46190f1957ef191f90b48e92341fc032a74609648dc671

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