Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efb7f47747a8500…

MALICIOUS

PDF

77.2 KB Created: 2020-11-24 22:22:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d41124fff04d86304c3c6c9913bd153f SHA-1: d65228f1f84b531c740b1988b86c284453673482 SHA-256: 8efb7f47747a8500ff8d75f83971e78b612b93a3036de4dd03ffc5eb4fa442bc
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate that this PDF is designed to redirect users to malicious infrastructure, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cctraff.ru/strik?utm_term=influencer+book+summary+pdf
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/9349067.pdf
    • https://dojarugakafep.weebly.com/uploads/1/3/4/4/134471698/ed60c.pdf
    • https://tenikekiso.weebly.com/uploads/1/3/0/7/130775729/bd560463d.pdf
    • https://fisotewefupug.weebly.com/uploads/1/3/1/0/131071176/2525056.pdf
    • https://cdn-cms.f-static.net/uploads/4454967/normal_5fa194a331fc0.pdf
    • https://cdn-cms.f-static.net/uploads/4367947/normal_5f9688f82de02.pdf
    • https://nuzaguwimera.weebly.com/uploads/1/3/4/4/134492670/2443515.pdf
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/kawetisudeziza.pdf
    • https://cdn-cms.f-static.net/uploads/4485318/normal_5fb4c2d490717.pdf
    • https://cdn-cms.f-static.net/uploads/4419193/normal_5f9fdc9b7ce19.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fusidejebi/80754814838.pdf
    • https://s3.amazonaws.com/vedexajawo/bootstrap_multi_page_form_template.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef1c.bin
28b9d2e6797ee57b38ca85b7ad4ced802409927c34f77cc907618a48f48dd42f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1C 5544 bytes
font_01_sfnt_off000101ea.bin
ac1f57cd8499944cd46c5bce566de9e743028d363e18bbbb75ff7eb9e77d6b62
pdf-font-stream PDF embedded font (sfnt) at offset 0x101EA 10864 bytes