Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47f954de3721edb…

MALICIOUS

PDF

75.9 KB Created: 2020-12-23 12:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f8d2397c9db35f31a631d30200b27975 SHA-1: 742870d75166dcf9b428bd50ca1e84f138ab972b SHA-256: e47f954de3721edb771217c3655a44154a70bb58d6a7737f417778dd837073fc
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to historical aircraft carriers. The presence of embedded URLs and the PDF structure strongly indicate an attempt to redirect users to malicious sites.

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://traffset.ru/strik?utm_term=british+aircraft+carriers+of+world+war+ii PDF link annotation
    • https://zukolarosaku.weebly.com/uploads/1/3/4/6/134662459/zufedutap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_5f935339c6dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368477/normal_5f88b3956942b.pdfIn PDF document text
    • https://wojopegoguw.weebly.com/uploads/1/3/4/6/134690206/zosideratukojofu.pdfIn PDF document text
    • https://puxezemugip.weebly.com/uploads/1/3/4/3/134311794/pezawavenumif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444638/normal_5fb30e0807848.pdfIn PDF document text
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/40fe9a0048258d.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/b5324574-6e1c-48a2-b09e-3378eca7e567/gulaxap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cb67ba0-cd90-443c-8bb0-b637c31e1cb7/50862127154.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce6ac8ad-df92-41f5-956c-e79cb6a52af2/mamigokadip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e765833f-8f2e-4ed5-98e8-add1b04a77f4/tok_presentation_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc98cbeb-837a-4d17-bcb7-1694f6c3effb/exercices_sur_la_formation_des_prix_cap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/902e4d8c-25ec-4a3b-a0b9-8285c124c7c2/woxivuwezukozotazaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45bee08a-7932-40f4-a646-82d62d359e52/ielts_listening_score_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/325c9d67-67cf-4e9e-ad39-ef2a66ef1a6f/vobivojubasaga.pdfIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/acceptable_forms_of_id_for_job.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c0126a0-c29e-4c28-b205-585655778ae9/acronyms_worksheets_for_5th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05225c8a-82eb-498c-a23f-ea3fdd1fdda5/tizazilarumubisepemo.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_off0000eca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA2 5248 bytes
SHA-256: d161ff46931982d4767fe1568b186c06ab5c8f611521c4f4e49c18fb7be853d3
font_01_sfnt_off0000fe88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE88 10784 bytes
SHA-256: f94730270a1b42b7be676cfd5499652ff9fcb8051cd454b0735f2a5b0bcfd7b1

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