Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddbbbcef25c0312e…

MALICIOUS

PDF

72.1 KB Created: 2020-11-20 17:23:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c433e01bff6d5da5a04c3d7c5f5c47f5 SHA-1: bae1a7715f03a2e87d183960e8abc865e7d785f7 SHA-256: ddbbbcef25c0312e014221885038fc6aa2795ce4c523e2a55c7453720b72d308
214 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, with one specifically identified as a malicious redirector. The presence of a link farm and the ML classifier's high confidence score indicate a strong likelihood of malicious intent, likely to redirect users to phishing or malware-hosting sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or content-luring attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=bed+sheet+with+elastic+called In PDF document text
    • https://mojipodo.weebly.com/uploads/1/3/4/5/134592530/sixezo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fa9cda398ccf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f8afb3566994.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/6764829.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447640/normal_5fa576498a85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_5f9caa7291cc4.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/7436389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420222/normal_5fa3079a11c4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411503/normal_5fad88c24202c.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/repokaxi_lexonimerosit_zolejag_momosebudal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5f9ea87915708.pdfIn PDF document text
    • https://zopojidiluze.weebly.com/uploads/1/3/4/3/134361294/2d7380641a3a763.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/cea36bfa-34a2-4f48-9fd9-cef12abcc509/2570976281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68047019-59f6-4baf-b18b-a03fc0de0339/sonilone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b4c742-cbe4-484f-8e44-2753ea942d50/rufoxunevuzeroniwoser.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_off0000dd92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD92 5072 bytes
SHA-256: 6fe1e272c8f7939f41c4c62d02d75a2e75b0684005880de1836351f5bd28e3f2
font_01_sfnt_off0000eee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE7 10864 bytes
SHA-256: 2ec36a59d942c2a8590672c23cb0d209fdf70b31c872728992f3cb4d6875df86

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