Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2e9b716ed235502…

MALICIOUS

PDF

82.6 KB Created: 2021-04-30 23:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 8936bde6c6b25a421ac8e845067102ef SHA-1: 9f86ea9b228c41e6ced714a3e7a32ea3652d4965 SHA-256: a2e9b716ed2355028c26e1c96710c806abab45ab2ed40a25597be06dc2fbe548
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9992

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://kuzutuzo.ru/strik?utm_term=%25C2%25BFcu%25C3%25A1ntos+puestos+hay+%25C2%25BFcu%25C3%25A1les+son+los+sueldos+%25C2%25BFqu%25C3%25A9+beneficios+ofrece+la+empresa PDF link annotation
    • http://sun-italy.space/82662682584dqm6z.pdfIn PDF document text
    • http://genusadnlo.space/60910207346iti5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_6063736b71048.pdfIn PDF document text
    • http://latuha.com/97556662767n0v1t.pdfIn PDF document text
    • http://paksorond.xyz/airport_737_idle_gamemjbxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410433/normal_605d720e52c19.pdfIn PDF document text
    • http://wiinorama.website/c_language_questions_and_answerszwmcu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480880/normal_604723fb48a0a.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/376f3521-bf25-477f-9447-ada002c36f2b/dyson_dc50_motor_not_working.pdfIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_09ca943432f24067bc83495bf35c5dcb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/indian_all_airport_list.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/datogojupuvobigukekap.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/19317163664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c42986-0b7d-416b-b9bb-339c8ecdf464/the_real_book_sixth_edition_free.pdfIn PDF document text
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_65d3dfd88ecb4a3392098254e6287028.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/71888414649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cddf661d-e181-4530-a451-6cf6a1b6a997/29916521135.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/transunion_free_credit_report_online_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abff43f1-466a-487c-bd03-60a450f1ab4d/r_programming_language_tutorial_online.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/advanced_excel_2013_book.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/mathematical_statistics_and_data_analysis.pdfIn PDF document text
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_274a296234c84924a27ded82431688fb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e526d138-2d70-41e5-a56c-898114495cc6/goxesujidofenivufaw.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_off0000fd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD99 6180 bytes
SHA-256: 2635febc1e4dc1bd01609c28df2ba6189c9d7ff36a10ebd17b914c30f5e9860a
font_01_sfnt_off000111a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A5 11976 bytes
SHA-256: 0f32be001c9d84a2868834aef6ce53b4a1e4bdd3de7a1b4dbe5ec7ebdde7f563

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