Malicious PDF — malware analysis report

Static analysis result for SHA-256 5521abada5b02a1b…

MALICIOUS

PDF

74.5 KB Created: 2021-05-20 05:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c122dc5e3e479b55a0e777a639d01963 SHA-1: c13f2643f5308ebea8c5be7072dec158dcac89b2 SHA-256: 5521abada5b02a1b3a9a8e8b1c36e850cb9661df8e10911ac512d8d486f12249
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 for 'Pdf.Phishing.Trojan'. The presence of a large number of external links, identified as a 'PDF link farm', suggests a phishing or SEO manipulation attempt. While no scripts were explicitly extracted, the PDF structure and link farm indicate a malicious intent to redirect users to potentially harmful external 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://resalured.ru/strik?utm_term=what+is+the+job+outlook+for+a+research+analyst PDF link annotation
    • https://bopilopuneliniw.weebly.com/uploads/1/3/5/3/135304065/biguzufefuzado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_6030f8b06438e.pdfIn PDF document text
    • https://kefuvavubuxega.weebly.com/uploads/1/3/1/1/131164002/8649615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449410/normal_6059ed181a1fb.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/faxaxos/blender_tutorial_2.90.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/the_bostonians_henry_james.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/bevowaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/gimivituvav.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/descargar_mp3_desnudate_mujer_frankie_ruiz.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/91443683221.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/how_to_record_dividend_in_quickbooks.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/can_you_buy_adobe_without_a_subscription.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/87175139787.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/blumenkranz_herzform_beerdigung.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/pejikubab.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/45448246679.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/find_someone_who_esl_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/73566909169.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/35809917999.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_off0000e515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE515 5364 bytes
SHA-256: 8992099809b882a9c843419118cac3b231ee4be361e1874d6cbacff6d0fb3251
font_01_sfnt_off0000f76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76B 10900 bytes
SHA-256: 5655c2b6ec73e128cb471b32bd0a4b944b5519d8d258b378ee364fddcb3b51d8

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