Malicious PDF — malware analysis report

Static analysis result for SHA-256 02fe6908f78baa4d…

MALICIOUS

PDF

80.8 KB Created: 2021-02-23 16:44:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: e44f5d62a5a399e6c661a067c50a3565 SHA-1: d6ec2e5a131f4963468808c4ce863be93930bd37 SHA-256: 02fe6908f78baa4d5e6db1b355d8f3bdc4b0900c768dd322103d2757d92e48cc
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Weebly-hosted PDFs, suggesting a link farm designed to direct users to malicious infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that at least one of these links leads to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/strik?utm_term=how+to+tell+how+old+a+remington+shotgun+is In PDF document text
    • https://bununijadepijag.weebly.com/uploads/1/3/5/2/135298825/tidepusumugid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462056/normal_5ff8b066d3912.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/f208bcdf77ef4b2.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/6487917.pdfIn PDF document text
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/1894045.pdfIn PDF document text
    • https://ruxunomitebapat.weebly.com/uploads/1/3/1/6/131606858/c8a514f.pdfIn PDF document text
    • https://pizosamijuge.weebly.com/uploads/1/3/4/3/134348406/3834317.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468563/normal_601ae2347bd34.pdfIn PDF document text
    • https://puzejiwitamino.weebly.com/uploads/1/3/1/4/131453698/5061764.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408197/normal_5ffd7caad3d35.pdfIn PDF document text
    • https://poxapoxidofex.weebly.com/uploads/1/3/4/0/134016688/jelejejun_guxamibadosek.pdfIn PDF document text
    • https://bujopulima.weebly.com/uploads/1/3/3/9/133997272/882a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426088/normal_6027982f2ed48.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_60035a11520e1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5ff66935d9eda.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/fogibi/cateye_velo_wireless_setting_time.pdfIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/78211855151.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/sisumazaweju.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/adobe_photoshop_uptodown.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_off0000ffd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD7 5292 bytes
SHA-256: 57399858f20cedaa03e7c93ef3e19dc0e1a1f61f31ecb3fa6c8939ebde850ffc
font_01_sfnt_off000111b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111B2 10488 bytes
SHA-256: 1e268e8d076f81dfcd25aa8977db0a2fc1a16359b41fda5dce2fd321f960283a

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