Malicious PDF — malware analysis report

Static analysis result for SHA-256 e548c5cc33ff1a20…

MALICIOUS

PDF

69.6 KB Created: 2020-11-25 23:11:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7e07117c535c6e359ba611fdd56abee9 SHA-1: d1b2c587218b4b015859642eac3dd48b7764da3d SHA-256: e548c5cc33ff1a201d1991a9cca15c9440dfbd59a43f5f05013d52e752453ccb
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, indicating malicious content. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the primary URLs identified is 'https://trafftec.ru/strik?utm_term=proclamation+of+neutrality+apush+significance', which is likely the intended destination for the user. No scripts were extracted, but the PDF structure and link farm heuristic strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://trafftec.ru/strik?utm_term=proclamation+of+neutrality+apush+significance PDF link annotation
    • https://dinomorozowi.weebly.com/uploads/1/3/4/6/134610364/koxojezow-pevetolivikumal-wosakejexu-moxigekuwaju.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/8e038d8a-8a88-4964-8f2a-3f98b76a7533/wafutolukiwumuligomifuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a66a089b-c5fd-41d0-bf29-362885325cbe/101_dog_tricks.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/fefatedudubokimexow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52734a52-36e6-4070-99af-8734cf0edcad/17566783185.pdfIn PDF document text
    • https://s3.amazonaws.com/fulazelof/tadimudovajizozaw.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/the_mudflats_blog.pdfIn PDF document text
    • https://s3.amazonaws.com/zagubip/jedodezadegulurexudiroz.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/us_visa_invitation_letter_template_business.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_off0000d41a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 5532 bytes
SHA-256: c0579dc10a4b323238aebd56fd8f9911a9fa05a01726cced8ef15b6b83cbfb75
font_01_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 10248 bytes
SHA-256: d776fb115173a05ad4d888b09c038cf114da5ada2166cd7ca2c6945edec37155

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