Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e50151e3c06ab6…

MALICIOUS

PDF

73.8 KB Created: 2020-11-24 16:55:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4a7975081757eb12712f1319b8dfa1b6 SHA-1: ee83f3e82b63d97333ceee667ba78267843c5d82 SHA-256: 67e50151e3c06ab6f56eaebd4032e24f6598afad4b8f8ed632a2e2e5165964bc
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. Another critical heuristic indicates a PDF link farm, with one of the URLs being 's3.amazonaws.com/vibuvomomuv/23025702814.pdf'. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting a phishing or trojan distribution attempt.

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://ggtraff.ru/123?utm_term=spt+sd-2201w+hose In PDF document text
    • https://motadali.weebly.com/uploads/1/3/4/3/134368257/2630051.pdfIn PDF document text
    • https://jewibotiguduxi.weebly.com/uploads/1/3/4/8/134864220/1499574.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/gezolavibimo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445333/normal_5fb92fca31dfa.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/vibuvomomuv/23025702814.pdfIn PDF document text
    • https://s3.amazonaws.com/rebomedug/zesegonupude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12a3a795-f329-4934-a500-1e178aa21b06/38316889485.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/st_anthony_novena_13_days.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/shore_middle_school_mentor_ohio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98345dd-a6cc-4a98-8394-0685d14a4b17/36237350943.pdfIn PDF document text
    • https://s3.amazonaws.com/jevuxozazebazug/hematology_reports_theranos.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/basketball_court_design_guide.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_off0000e312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE312 5260 bytes
SHA-256: b28ded4d1f3cfa045ad419cf28b0fa984df259722e33dc5f352dc56076719e55
font_01_sfnt_off0000f51e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51E 11080 bytes
SHA-256: 7eec2bd48e26a6d8a90cf3ebf4cea4b61548f76bd7bee614549d90d00864930c

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