Malicious PDF — malware analysis report

Static analysis result for SHA-256 568e5546bac3f977…

MALICIOUS

PDF

62.7 KB Created: 2020-11-26 02:03:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 301a1881176739f3131beb3471530f38 SHA-1: eb7696f0e34d65035889b345de6fa48fa77158f1 SHA-256: 568e5546bac3f977916c33bfbc8a9d9d5123de027fd13f5c8595ee0217d1e754
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to redirector infrastructure or are part of a link farm designed to manipulate search engine results. One critical heuristic indicates a link to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=graphic+artists+guild+handbook+pdf In PDF document text
    • https://sokuvotaboraj.weebly.com/uploads/1/3/0/7/130776263/5282818.pdfIn PDF document text
    • https://dawofatodir.weebly.com/uploads/1/3/4/7/134756430/8376577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412758/normal_5fbe3e9fcc363.pdfIn PDF document text
    • https://lonodoxelu.weebly.com/uploads/1/3/4/3/134305804/sarufobime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_5fb2dd7dbb8ca.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/sonatadejil.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/guxosa/37408411858.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/78442374903.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/34734781126.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/chapter_3_ecology_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nabifovu/cambridge_latin_course_book_3_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/adp_payroll_calendar_2019.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_off0000b414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB414 5652 bytes
SHA-256: c4add71748e0d231be64bb1bad3c1c5ee5d3464ec623a877834db77d2fd0e31a
font_01_sfnt_off0000c744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC744 11748 bytes
SHA-256: 08f121804af348996d81fddb6011283770b270759816b7fa29ae17a4e64d904a

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