Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2fd2c4f4d5387d…

MALICIOUS

PDF

72.5 KB Created: 2021-02-17 04:52:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3acd9ab4fa12539a1ecae89f17c71ee7 SHA-1: 64eaafdd152a729185565ea58c234934d0e25a6d SHA-256: af2fd2c4f4d5387d73f06c7e9f0a8f4d315fb2b9fa2a34c5804f939a73fbf1d6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/wix?keyword=ice+cream+museum+miami+tickets In PDF document text
    • http://togoxuruk.22web.org/19588838245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459328/normal_5feb40c10f618.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/6540062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407747/normal_600a8835305ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_600e0a23af9e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374022/normal_5fe30c111bdd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_602064e2976a4.pdfIn PDF document text
    • https://xidujodoj.weebly.com/uploads/1/3/1/0/131071067/roxikinosoxilix_xafunawavap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_600d2589e1ec4.pdfIn PDF document text
    • https://vurinilobato.weebly.com/uploads/1/3/1/4/131454355/4544155.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465025/normal_6020f96154874.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370051/normal_5fe17f6e93ee9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://karapazixegipi.epizy.com/89198132658.pdfIn PDF document text
    • http://wutodabegaf.epizy.com/cnn_breaking_news_and_headlines_for_today.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_off0000e09d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09D 4916 bytes
SHA-256: 3b0c03e57b7ad486f6f45fc81bf6f1edf576659773c881f69e9c3a1b3a830683
font_01_sfnt_off0000f139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF139 10460 bytes
SHA-256: 4426a8149941150f26cb6ed983c5ab4bd50f4407ed05069e231519a5077f3271

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